## Launch Checklist
<!-- Thanks for the PR! Feel free to add or remove items from the
checklist. -->
- [x] Briefly describe the changes in this PR.
- [ ] Link to related issues.
- [x] Include before/after visuals or gifs if this PR includes visual
changes.
- [ ] Write tests for all new functionality.
- [x] Add an entry to `CHANGELOG.md` under the `## main` section.

## Launch Checklist
This adds information about how to translate Maputnik and how to get in
touch with people who have translated in the past.
@keichan34, @jieme, @lhapaipai - I need your approval for this so that
people in the future will know to contact you in case text is being
added and they need help translating it.
CC: @ianthetechie
I've also changed the word "Language" in the upper part of the screen so
that it won't be translated in case you accidentally switch language,
and you need to switch back.
I've also fixed some RTL issues in the CSS and updated the maplibre
components labels when the language changes.
This is a rough start on adding react-i18next. I'll be working on adding
more translatable strings and translations in the coming days. I'm going
to need to wrap class components in HOCs, so let me know if there's
something I should be fixing before doing that. I'm thinking now to keep
the exported class names exactly the same, and rename the existing
classes by prefixing an `I` (for internal). For example:
```
export default class AppToolbar ...
```
becomes
```
class IAppToolbar ...
const AppToolbar = withTranslation()(IAppToolbar);
export default AppToolbar;
```
I'll be able to contribute Japanese strings (I've talked to a couple
people on my team and they'll be happy to help as well), so that's the
language I decided to go with in this PR.
Closes#746
---------
Co-authored-by: Ko Nagase <nagase@georepublic.co.jp>
Co-authored-by: Harel M <harel.mazor@gmail.com>