Spanish phrase
No te entiendo.
Meaning
I don't follow what you're saying.
When to use it
Says the speaker cannot follow the other's point. It is conversational and common among coworkers to ask for clarification, and it sounds too casual for formal situations.
Example dialogue
Voy a resumir: primero reducir costes, luego buscar nuevos mercados.
Let me summarize: first reduce costs, then seek new markets.
No te entiendo, ¿puedes explicarlo otra vez?
I don't follow what you're saying. Can you explain it again?