apply/language.py references LANGUAGE via \`from settings import *\`, but
the constant was never added to apply/settings.py. Python only errored at
the first runtime use — which is \`str(ApplicationResult)\` in the /apply
handler. Any outcome that didn't short-circuit before the final \`return
ApplyResponse(message=str(result), …)\` blew up with NameError → 500.
Add LANGUAGE = getenv("LANGUAGE", "de") so existing translations.toml
keys resolve. Reproduced live inside the apply container: NameError:
name 'LANGUAGE' is not defined at language.py:15.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>