Element Web only follows browser locale on initial load

### Steps to reproduce

1. Set browser settings to request Polish version of pages with higher priority than English
2. Open Element Web
3. Set browser settings to request English version of pages with higher priority than Polish
4. ??????

### Outcome

#### What did you expect?

browser set to request English version will give you me English version of pages

#### What happened instead?

I get Polish ones

### Operating system

Lubuntu 20.04

### Browser information

Firefox 123.0.1 (64-bit)

### URL for webapp

https://app.element.io/#/room/#postgis:osgeo.org

### Application version

Wersja Element: 1.11.60

### Homeserver

no idea what is Homeserver

### Will you send logs?

Yes

The issue names no source file or test. Start by reproducing the behavior in Element Web with Firefox language preferences, then trace how the browser locale is detected during initial load and whether later preference changes are observed. Done means changing the browser preference from Polish to English updates the displayed language without reopening the app.

Written by the indexing model from the issue text.