Setting English as language in settings does not persist

[CirnoT]

📑 I have found these related issues/pull requests

#4244

🛡️ Security Policy

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Description

Setting language in settings to English does not persist between reloads of page because internally, Uptime Kuma does not recognize that language as valid.

👟 Reproduction steps

1. Ensure auto-detected language is something else than English
2. Go to Settings -> Appearance -> Language and select English
3. Refresh page

👀 Expected behavior

Language settings is persisted according to user preference

😓 Actual Behavior

Language is reverted to auto-detected one based on locale

🐻 Uptime-Kuma Version

1.23.12

💻 Operating System and Arch

Docker

🌐 Browser

Chromium124.0.6367.61

🖥️ Deployment Environment

• Runtime: Docker version 25.0.4, build 1a576c5
• Database: sqlite/embedded
• Filesystem used to store the database on: ext4 via docker volume

📝 Relevant log output

No response