Tech: cache key depends on locale

[colinux]

Dans uen autre PR, j'overriderai l'helper pour tjs intégrer la locale (déjà fait ailleurs)

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ Redis::CannotConnectError: Connection refused - connect(2) for 192.168.33.121:6379 (Redis::CannotConnectError) Users::DossiersController#index View Issue
• ‼️ Redis::CannotConnectError: Connection refused - connect(2) for 192.168.33.121:6379 (Redis::CannotConnectError) Users::CommencerController#commencer View Issue

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