diff --git a/core/builder/context.py b/core/builder/context.py
index 1ad77c53..a3b9eeb6 100644
--- a/core/builder/context.py
+++ b/core/builder/context.py
@@ -9,7 +9,7 @@
 from enschema import Schema, SchemaMissingKeyError, SchemaError, And
 from typing import Any, Self
 
-from core.utilities import dicts, colour as c, crawler, logger
+from core.utilities import colour as c, crawler, logger
 
 log = logger.setupLog('dgs')
 
@@ -80,7 +80,11 @@ def adopt(self, **ctxs: 'Context') -> Self:
         """ Adopt a new child context `ctx` under the key `key` """
         for key, ctx in ctxs.items():
             assert isinstance(ctx, Context)
-            self.data[key] = dicts.merge(self.data.get(key), ctx.data)
+
+            if key in self.data:
+                self.data[key] |= ctx.data
+            else:
+                self.data[key] = copy.deepcopy(ctx.data)
 
             if self._schema is not None:
                 # If child has no schema, accept anything, otherwise merge
diff --git a/core/builder/i18n.py b/core/builder/i18n.py
index 68873a91..df8a3c91 100644
--- a/core/builder/i18n.py
+++ b/core/builder/i18n.py
@@ -14,7 +14,7 @@ def __init__(self, root, language):
         self.populate(language)
 
     def populate(self, language):
-        self.data = {'i18n': i18n.languages[language].as_dict()}
+        self._data = {'i18n': i18n.languages[language].as_dict()}
         self.add_id(language)
 
 
diff --git a/core/builder/jinja.py b/core/builder/jinja.py
index fd166d56..8224306f 100644
--- a/core/builder/jinja.py
+++ b/core/builder/jinja.py
@@ -4,7 +4,7 @@
 import logging
 from pathlib import Path
 
-from core.utilities import dicts, filters, colour as c
+from core.utilities import filters, colour as c
 
 log = logging.getLogger('dgs')
 
diff --git a/core/templates/override.jtt b/core/templates/override.jtt
index e3356d8f..78af544a 100644
--- a/core/templates/override.jtt
+++ b/core/templates/override.jtt
@@ -1,5 +1,5 @@
 \selectlanguage{(* i18n.name *)}
-\setquotestyle[(* i18n.quotes.extra|default('') *)]{(* i18n.quotes.id *)}
+\setquotestyle[(* i18n.quotes.extra|default('') *)]{(* i18n.quotes.babel_id *)}
 
 \sisetup{
     output-decimal-marker   = {(* i18n.siunitx.output_decimal_marker *)},
diff --git a/core/utilities/context.py b/core/utilities/context.py
deleted file mode 100644
index 834d4fc4..00000000
--- a/core/utilities/context.py
+++ /dev/null
@@ -1,110 +0,0 @@
-import math
-import os
-import pprint
-import sys
-import yaml
-
-from collections.abc import Iterable
-
-from core.utilities import dicts, colour as c
-
-
-class Context:
-    def __init__(self):
-        self.data = {}
-
-    def add(self, *dictionaries):
-        """ Merge a list of dictionaries into this context, overriding same keys """
-        self.data = dicts.merge(self.data, *dictionaries)
-        return self
-
-    def absorb(self, key, ctx):
-        """ Absorb a new context `ctx` under the key `key` """
-        self.data[key] = dicts.merge(self.data.get(key), ctx.data)
-        return self
-
-    def load_yaml(self, *args):
-        filename = os.path.join(*args)
-        try:
-            contents = yaml.load(open(filename, 'r'), Loader=yaml.SafeLoader)
-            contents = {} if contents is None else contents
-        except FileNotFoundError:
-            print(c.err("[FATAL] Could not load YAML file"), c.path(filename))
-            sys.exit(43)
-
-        self.data = contents
-        return self
-
-    def load_meta(self, *args):
-        return self.load_yaml(self.node_path(*args) / 'meta.yaml')
-
-    def node_path(self, *args):
-        raise NotImplementedError("Child classes must implement node_path method")
-
-    def print(self):
-        pprint.pprint(self.data)
-
-    def set_number(self):
-        return self.add({'number': self.number})
-
-    def add_number(self, number):
-        return self.add({'number': number})
-
-    def set_id(self):
-        return self.add({'id': self.id})
-
-    def add_id(self, new_id):
-        return self.add({'id': new_id})
-
-
-def is_prime(what: int) -> int:
-    if not type(what) is int or what < 2:
-        return 0
-    else:
-        return int(all(what % x != 0 for x in range(2, math.isqrt(what) + 1)))
-
-
-def split_mod(what: Iterable, count: int, first: int = 0) -> list:
-    result = [[] for _ in range(0, count)]
-    for i, item in enumerate(what):
-        result[(i + first) % count].append(item)
-    return result
-
-
-def split_div(what, count):
-    return [] if what == [] else [what[0:count]] + split_div(what[count:], count)
-
-
-def split_callback(what, callback, count):
-    """
-        Split `what` by `callback` function, using `count` bins
-        what: [a]
-        callback: a -> int, result must be 0 <= result < count
-    """
-    result = [[] for _ in range(0, count)]
-    for i, item in enumerate(what):
-        result[callback(i)].append(item)
-
-    return result
-
-
-def add_numbers(what, start=0):
-    result = []
-    num = start
-    for item in what:
-        result.append({
-            'number': num,
-            'id': item,
-        })
-        num += 1
-    return result
-
-
-def numerate(objects, start=0):
-    num = start
-    for item in objects:
-        dicts.merge(item, {
-            'number': num
-        })
-        num += 1
-    return objects
diff --git a/core/utilities/dicts.py b/core/utilities/dicts.py
deleted file mode 100644
index 73679b69..00000000
--- a/core/utilities/dicts.py
+++ /dev/null
@@ -1,26 +0,0 @@
-from typing import Iterable, Dict
-
-
-def merge(parent: Dict, *children: dict, overwrite=True) -> Dict:
-    for child in children:
-        parent = merge_one(parent, child)
-    return parent
-
-
-def merge_one(parent: Dict, child: Dict, *, overwrite=True) -> Dict:
-    if id(parent) == id(child):
-        return parent
-
-    if parent is None:
-        return child
-
-    for key in child:
-        if key in parent:
-            if isinstance(parent[key], dict) and isinstance(child[key], dict):
-                merge_one(parent[key], child[key])
-            else:
-                parent[key] = child[key]
-        else:
-            parent[key] = child[key]
-
-    return parent
diff --git a/core/utilities/lists.py b/core/utilities/lists.py
index 4d21a179..9f3fa8f8 100644
--- a/core/utilities/lists.py
+++ b/core/utilities/lists.py
@@ -1,10 +1,8 @@
 import itertools
 from typing import Iterable, Callable, List, Dict, Any
 
-from core.utilities import dicts
 
-
-def add_numbers(items: List[Any], numbers: Iterable=itertools.count()) -> List[Dict]:
+def add_numbers(items: List[Any], numbers: Iterable = itertools.count()) -> List[Dict]:
     """
     Take a list `items` and return a list of dictionaries with number included.
 
@@ -20,7 +18,7 @@ def add_numbers(items: List[Any], numbers: Iterable=itertools.count()) -> List[D
     List[Dict]
         A list of dictionaries in format {'number': int, 'id': item}
     """
-    assert type(items) == list
+    assert isinstance(items, list), f"Cannot add numbers to {type(list)}"
 
     result = []
     for item in items:
@@ -31,12 +29,10 @@ def add_numbers(items: List[Any], numbers: Iterable=itertools.count()) -> List[D
     return result
 
 
-def numerate(items: Dict, numbers: Iterable=itertools.count()) -> List[Dict]:
+def numerate(items: dict, numbers: Iterable = itertools.count()) -> dict:
     for item in items:
-        assert type(item) == dict
-        dicts.merge(item, {
-            'number': next(numbers)
-        })
+        assert isinstance(item, dict)
+        item |= {'number': next(numbers)}
     return items
 
 
diff --git a/modules/naboj/builder/contexts/base.py b/modules/naboj/builder/contexts/base.py
index 9e0819f6..d0636721 100644
--- a/modules/naboj/builder/contexts/base.py
+++ b/modules/naboj/builder/contexts/base.py
@@ -5,7 +5,8 @@
 
 from core.builder import context
 from core.builder.builder import get_last_commit_hash, get_branch
-from core.utilities.schema import valid_language, CommitHash
+from core.utilities.schema import valid_language
+from core.builder.validator import CommitHash, String
 
 
 class ContextNaboj(context.FileSystemContext):
diff --git a/modules/naboj/builder/contexts/hierarchy.py b/modules/naboj/builder/contexts/hierarchy.py
index f29eb565..e9c3b731 100644
--- a/modules/naboj/builder/contexts/hierarchy.py
+++ b/modules/naboj/builder/contexts/hierarchy.py
@@ -6,13 +6,14 @@
 
 from core import i18n
 from core.utilities import lists
-from core.utilities.schema import string, valid_language, valid_language_name
+from core.utilities.schema import valid_language, valid_language_name
+from core.builder.validator import String
 from .base import ContextNaboj
 
 
 class ContextCompetition(ContextNaboj):
     _schema = Schema({
-        'id': string,
+        'id': String,
         'tearoff': {
             'per_page': int,
             'height': int,
@@ -22,8 +23,8 @@ class ContextCompetition(ContextNaboj):
             'inner': int,
         },
         'organisation': {
-            'name': string,
-            'address': string,
+            'name': String,
+            'address': String,
         },
         'constants': {
             str: {
@@ -33,7 +34,7 @@ class ContextCompetition(ContextNaboj):
                 Optional('siextra'): str,
             }
         },
-        'URL': string,
+        'URL': String,
         'hacks': dict,
     })
 
diff --git a/modules/naboj/builder/language.py b/modules/naboj/builder/language.py
index 3e0f3d26..f8ef6cc6 100644
--- a/modules/naboj/builder/language.py
+++ b/modules/naboj/builder/language.py
@@ -21,7 +21,7 @@ def add_arguments(self):
         super().add_arguments()
         self.parser.add_argument('language', type=str)
 
-    def id(self):
+    def ident(self):
         return self.args.competition, self.args.volume, self.args.language
 
     def path(self):
diff --git a/modules/naboj/module.mk b/modules/naboj/module.mk
index 8cfff74b..2514140d 100644
--- a/modules/naboj/module.mk
+++ b/modules/naboj/module.mk
@@ -146,7 +146,8 @@ build/naboj/%/pdf-prerequisites: \
 	$$(subst source/,build/,$$(subst .gp,.pdf,$$(wildcard source/naboj/$$*/problems/*/*.gp))) \
 	$$(subst source/,build/,$$(subst .gp,.pdf,$$(wildcard source/naboj/$$*/problems/*/*/*.gp))) \
 	$$(wildcard source/naboj/$$*/meta.yaml) \
-	$$(subst $$(cdir),,$$(abspath source/naboj/$$*/../meta.yaml)) ;
+	$$(subst $$(cdir),,$$(abspath source/naboj/$$*/../meta.yaml)) \
+	build/core/i18n ;
 
 # All problems, solutions and answers for every language, and overall
 # <competition>/<volume>
@@ -328,8 +329,9 @@ output/naboj/%: \
 
 # All targets for all venues
 # <competition>/<volume>
-output/naboj/%/venues: \
-	$$(foreach dir,$$(subst source/,output/,$$(wildcard source/naboj/$$*/venues/*)), $$(dir)) ;
+output/naboj/%/venues:
+#	$$(subst source/,output/,$$(wildcard source/naboj/$$*/venues/*)) ;
+	@echo $(subst source/,output/,$(wildcard source/naboj/$*/venues/*)) ;
 
 output/naboj/%/all: \
 	output/naboj/%/languages \
diff --git a/modules/poetry/builder/context.py b/modules/poetry/builder/context.py
index cfe04f56..050346e7 100644
--- a/modules/poetry/builder/context.py
+++ b/modules/poetry/builder/context.py
@@ -4,7 +4,7 @@
 
 sys.path.append('.')
 
-from core.utilities import context
+from core.builder import context
 
 
 class ContextPoetry(context.Context):
diff --git a/modules/scholar/builder/contexts/buildable.py b/modules/scholar/builder/contexts/buildable.py
index 2aac001c..ecc3b2c8 100644
--- a/modules/scholar/builder/contexts/buildable.py
+++ b/modules/scholar/builder/contexts/buildable.py
@@ -16,6 +16,7 @@ def populate(self, course: str, year: int, issue: int):
             module=ContextModule('scholar'),
             course=ContextCourse(self.root, course),
             year=ContextYear(self.root, course, year),
-            i18n=ContextI18n(self.root, self.data['course']['language']),
             issue=self._issue_context_class(self.root, course, year, issue),
+        ).adopt(
+            i18n=ContextI18n(self.root, self.data['course']['language']),
         )
diff --git a/modules/scholar/builder/lecture.py b/modules/scholar/builder/lecture.py
index 1df86c30..14b10dd5 100644
--- a/modules/scholar/builder/lecture.py
+++ b/modules/scholar/builder/lecture.py
@@ -15,7 +15,7 @@ def add_arguments(self):
         self.parser.add_argument('course', type=str)
         self.parser.add_argument('lecture', type=str)
 
-    def id(self):
+    def ident(self):
         return (self.args.course, self.args.lecture)
 
 
diff --git a/modules/scholar/module.mk b/modules/scholar/module.mk
index c8e722f6..5dcd3ebd 100644
--- a/modules/scholar/module.mk
+++ b/modules/scholar/module.mk
@@ -58,7 +58,8 @@ build/scholar/%/pdf-prerequisites: \
 	$$(subst source/,build/,$$(subst .svg,.pdf,$$(wildcard source/scholar/$$*/*/*.svg))) \
 	$$(subst source/,build/,$$(subst .gp,.pdf,$$(wildcard source/scholar/$$*/*.gp))) \
 	$$(subst source/,build/,$$(subst .gp,.pdf,$$(wildcard source/scholar/$$*/*/*.gp))) \
-	source/scholar/$$*/meta.yaml ;
+	source/scholar/$$*/meta.yaml \
+	build/core/i18n ;
 
 build/scholar/%/handout: \
 	$$(subst source/,build/,$$(subst .md,.tex,$$(wildcard source/scholar/$$*/*.md))) \
diff --git a/modules/seminar/module.mk b/modules/seminar/module.mk
index 12b8a2a3..dc25325d 100644
--- a/modules/seminar/module.mk
+++ b/modules/seminar/module.mk
@@ -59,7 +59,8 @@ build/seminar/%/pdf-prerequisites: \
 	$$(subst source/,build/,$$(subst .svg,.pdf,$$(wildcard source/seminar/$$*/*/*.svg))) \
 	$$(subst source/,build/,$$(subst .gp,.pdf,$$(wildcard source/seminar/$$*/*/*.gp))) \
 	$$(wildcard source/seminar/$$*/*/meta.yaml) \
-	source/seminar/$$*/meta.yaml ;
+	source/seminar/$$*/meta.yaml \
+	build/core/i18n ;
 
 output/seminar/%/html-prerequisites: \
 	$$(subst source/,output/,$$(wildcard source/seminar/$$*/*/*.jpg)) \
diff --git a/modules/simple/builder/builder.py b/modules/simple/builder/builder.py
index 7c285e4f..e1a4a731 100644
--- a/modules/simple/builder/builder.py
+++ b/modules/simple/builder/builder.py
@@ -14,11 +14,11 @@ def create_argument_parser(self):
         self.parser.add_argument('year', type=int)
         self.parser.add_argument('issue', type=int)
 
-    def id(self):
-        return (self.args.course, self.args.year, self.args.issue)
+    def ident(self):
+        return self.args.course, self.args.year, self.args.issue
 
     def path(self):
-        return (self.args.course, f'{self.args.year:04d}', self.subdir, f'{self.args.issue:02d}')
+        return self.args.course, f'{self.args.year:04d}', self.subdir, f'{self.args.issue:02d}'
 
 
 class BuilderSingle(builder.BaseBuilder):
diff --git a/modules/simple/builder/context.py b/modules/simple/builder/context.py
index 42d07795..d7a53ac3 100644
--- a/modules/simple/builder/context.py
+++ b/modules/simple/builder/context.py
@@ -3,7 +3,7 @@
 
 sys.path.append('.')
 
-from core.utilities import context
+from core.builder import context
 
 
 class ContextScholar(context.Context):
@@ -20,21 +20,23 @@ def node_path(self, root, course=None, year=None, target_type=None, issue=None):
 class ContextScholarBase(ContextScholar):
     def __init__(self, root, course, year):
         super().__init__()
-        self.absorb('module', ContextModule('scholar'))
-        self.absorb('course', ContextCourse(root, course))
-        self.absorb('year', ContextYear(root, course, year))
+        self.adopt(
+            module=ContextModule('scholar'),
+            course=ContextCourse(root, course),
+            year=ContextYear(root, course, year),
+        )
 
 
 class ContextHomework(ContextScholarBase):
     def __init__(self, root, course, year, issue):
         super().__init__(root, course, year)
-        self.absorb('issue', ContextIssue(root, course, year, 'homework', issue))
+        self.adopt(issue=ContextIssue(root, course, year, 'homework', issue))
 
 
 class ContextHandout(ContextScholarBase):
     def __init__(self, root, course, year, issue):
         super().__init__(root, course, year)
-        self.absorb('issue', ContextIssue(root, course, year, 'handouts', issue))
+        self.adopt(issue=ContextIssue(root, course, year, 'handouts', issue))
 
 
 class ContextModule(ContextScholar):
diff --git a/source/naboj/chem b/source/naboj/chem
index 33bb31ea..80e20c1c 160000
--- a/source/naboj/chem
+++ b/source/naboj/chem
@@ -1 +1 @@
-Subproject commit 33bb31eafa586adfcc99b3be508b681a359d82cc
+Subproject commit 80e20c1cd28cfc81b33b210d2ddf8bafcee5586b
diff --git a/source/naboj/phys b/source/naboj/phys
index 538ec1b6..884cd529 160000
--- a/source/naboj/phys
+++ b/source/naboj/phys
@@ -1 +1 @@
-Subproject commit 538ec1b667e6e2b57f156a1de73c60fd100bd1a8
+Subproject commit 884cd529e63092d821c380564e3978e1aeb6cd5d
diff --git a/source/scholar/TA1 b/source/scholar/TA1
index 056f8336..07e8a277 160000
--- a/source/scholar/TA1
+++ b/source/scholar/TA1
@@ -1 +1 @@
-Subproject commit 056f833613134c66fa8fb2ba366106f832cb8d50
+Subproject commit 07e8a2778e6fb30ca414beaf872e27d0608a2bb3
diff --git a/source/scholar/TA2 b/source/scholar/TA2
index b72d1cf7..e188b746 160000
--- a/source/scholar/TA2
+++ b/source/scholar/TA2
@@ -1 +1 @@
-Subproject commit b72d1cf70c0fadc1b6beb85362b57ba688d8df37
+Subproject commit e188b7464bd5682a7643b5e0c1663e6bee8bd4b4