> Note: this article is a translation from the original “Soy Tech Lead y no me hacen caso. ¿Qué hago?”, in Spanish.

I wonder if "tech lead" coincidentally are two words that are the same in Spanish as English, or if this is considered a technical phrase.

Totally not the same. Its used as technical phrase. In europe we have many languages, but in most of them we use the term Tech lead as phrase.