Russian langiage

Good Morning,
i need that in the invoice must be description of the goods in two language (Italian and Russian)
i have setted MAIN_PDF_FORCE_FONT with the font DejaVuSans and now the descriprion is ok, but the font size is too big and goes out of the invoice fields.
I’have tryng to reduce it in the file “main.lang” the size will be ok ma many other fields (bank transactions for example) lose the symbols of separation and also the button to enter dolibarr becomes huge.
Some suggest?