Refurbished with specific language support?

All macs are multilingual and you can customize the language of the OS yourself in a few seconds via the preference settings.

I doubt that Apple has any refurbished Macs with keyboards other than standard US, but the only way to find out for sure is to ask them directly yourself, nobody in these user to user help forums would have any information about it. Of course you can also use the preference settings to change the mapping of the keyboard to any language you want.

Tom Gewecke has already provided the crucial information.

RE: What is printed on the keys:

My high school typing teacher said if she had her way, typewriter keys would be blank, and you would be forced to use the key chart you cleverly mounted above the copy station to figure out what key to press (if you could not quite remember).

If you do not completely agree, a fine-point marker can be used to add important glyphs to certain keys. All non-English keyboards also have English glyphs on the keys already.