If you think your friends/network would find this useful, please share it with them – I’d really appreciate it.
Step 1: Go to make.powerapps.com
Step 2: Go to Setting. Look for the ⚙ icon in the top right corner.

Step 3: A dialog pops up and with language settings.

Step 4: you can change the language you want from the drop down list under Choose language.

Step 5: Choose a language and click Save.

Step 6: Refresh your browser and see that the language is changed.

Hope it was useful.