Using (customized) langauge file for categories and products

[ydl]

I want to have a language file that will be used for: category names, product names, product short description, product description etc.
The idea is to include in the string of a specific field that will be replace by the specific language string.

I didn't find anything similar to that... so, if I am wrong, please, let me know.

I implement such a mechanism in the specific template I have created to a specific shop, as part of the template (override) code.
I did it because the customer supplied me with 7 language files...

Do anyone thin it will be good to convert my code to a VM plugin?