How to Say "to specialize" in Spanish
The Spanish word for “to specialize” is “especializar” — B1 level. This is a very common word in everyday Spanish.

Examples
Ella decidió especializarse en medicina deportiva.
She decided to specialize in sports medicine.
Es mejor especializarse para conseguir un mejor empleo.
It is better to specialize to get a better job.
Nuestra empresa se especializa en software educativo.
Our company specializes in educational software.
The 'In' Connection
In Spanish, we always use the word 'en' after especializarse to say what subject you are focusing on, just like 'in' in English.
The Spelling Swap
When you have an 'e' sound after the 'z', the 'z' turns into a 'c'. This happens in the 'yo' form of the past tense: 'especialicé'.
Forgetting the 'Se'
Mistake: “Yo quiero especializar en leyes.”
Correction: Yo quiero especializarme en leyes. Use the little 'me' or 'se' word when you are the one doing the specializing.
Wrong Connector Word
Mistake: “Me especializo de matemáticas.”
Correction: Me especializo en matemáticas. Always use 'en' for the field of study.
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