Applying languages / locale selectively: is it possible?

Solution 1:

Abolutely,

• go to System → Administration → Language Support

• at Language, select English as your default language:

  

• And in the Text tab, choose Dutch as your preffered Locale for numbers, dates and currency.

  

I've been using this setting for a long time, and it's a bit weird sometimes, you may see something like "This file was modified on Maandag...", but it works very well with most apps.

After a bit of troubleshooting, it turns out you also have to:

• Click 'Apply System-Wide'

• Reboot

Solution 2:

For some reason it seems to work now.

What I did:

• Click 'Apply System-Wide'
• Reboot

I'd swear I did this before, but logic is against me.