Language
The interface is in English. Programme names, quoted sources and eligibility wording stay in the language the funder published them in — a machine-translated benefit rule would be less accurate, and you will read the official page in that language anyway.
Unclaimed is a discovery tool, not legal, tax or financial advice. Eligibility rules change; only the official body named on each programme page can confirm what you are entitled to. Always read the source page before applying.