VM 3.0.12 PayPal std checkout: [item_name_1] => empty if NON-english characters

[burlado]

Dear community,

I have a difficulty with implementing PayPal payment method in my website (Joomla 3.4.5 & Virtuemart 3.0.10). Everything works fine except NON-english characters in Product name (spanish ñ or russian characters).
I use standard PayPal payment method with option "shopping cart" in order to display complete list of products in description of order summary in PayPal page.

If product name contains NON-english characters, after checkout mentioned characters don't appear in description of Paypal's order summary. Examples from debug info:

Product name: Castañetas
Log: [item_name_1] => Castaetas

Product name: Балалайка
Log: [item_name_1] =>

Spanish "ñ" doesn't appear correctly and russian characters don't appear at all.
If I add to the cart products with only russian characters in names, after checkout I get error from Paypal saying that Shopping cart is empty, obviously since [item_name_1] => is empty.

Somebody knows how it can be fixed?

[burlado]

Installed a new joomla 3.4.5 and last virtuemart 3.0.12, but still can't use NON-english characters for product's names.
Payment type: shopping cart from Paypal Standart checkout plugin doesn't work if product name contains NON-english characters.
Can it be because of my server configurations? Can somebody check it please?