Ruling Foreign Cards

[Serpens]

I want to ask, is it possible to use cards in languages other than the official ones(eg. French and English for canada, German for Germany and Austria, etc.). I know there was a ruling regarding that one could have at max 10% of his deck in foregin language as long as he provided reference, but I don't know if it's still legal.
Thank you very much in advance.

 

[TheStrictNein]

These are the cards that are legal in each region:

Canada Local—English and French
Europe Local—English, French, German, Italian, Spanish, and Portuguese
Mexico Local—English and Spanish
South America Local—English, Spanish, and Portuguese
United States, Asia Pacific, and South Africa Local—English

You cannot use any amount of foreign cards in a deck at an official event.

All reference cards must also be in one of the legal languages for your region.