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I like the idea. And we could even use it as replacement for the development language. That one is kind of useless, as it breaks most things due to missing placeholders.
Pushed a commit to avoid replacing stuff of the intl plugin, as otherwise the format strings are replaced and can be used anymore for number and date formatting...

That one is kind of useless, as it breaks most things due to missing placeholders.

That's true, but I feel like it has another very useful use case: You can very quickly find out how a translation string you see anywhere in Matomo is called. Especially for non-technical users and translators. So I would leave it as a separate thing.

I think there is just one larger issue with this code: It breaks HTML inside translation strings (which I think isn't that rare). And I can't think of a simple solution for that (I think laravel uses a full HTML parser with allowed attributes that get modified to solve the issue).

And semi-related, it would also be nice if we had a way to increase the length of strings to simulate (very often German) strings overflowing.

That's true, but I feel like it has another very useful use case: You can very quickly find out how a translation string you see anywhere in Matomo is called. Especially for non-technical users and translators. So I would leave it as a separate thing.

Even for that case it would need to be improved. The problem is, that all number formatting and date formatting won't work correctly anymore and in some places it might even cause php or javascript errors due to missing placeholders.
I actually never used it in the last years.

If you don't want this PR to be closed automatically in 28 days then you need to assign the label 'Do not close'.

This PR was last updated more than one month ago, maybe it's time to close it. Please check if there is anything we still can do or close this PR. ping @matomo-org/core-reviewers