se pueden colocar en los etiquetados palabras claves en ingles y español al mismo tiempo?

Put the keywords in just one language - whichever language is your default.  See the instructions from Adobe Stock.

Use a single language: All keywords need to be in the same language — the one you selected under Keyword Language. Our search engine will automatically translate them into other languages available on Adobe Stock. We support titles and keywords in English, French, German, Spanish, Italian, Polish, Portuguese, Japanese, and Korean

https://helpx.adobe.com/stock/contributor/help/titles-and-keyword.html