apellido paterno= last name lugar de trabajo=place of work o work's address estado de animo= how are you feeling? These phrases sound from a medical form. the mark is a typographical error

Lugar de trabajo = work place
a'nimo = ánimo
estado de animo = I think you can just use mood for this.

estado de animo = I think you can just use mood for this.

I agree, but we might also say "state of mind."

BTW, workplace is one word, and we don't say "work place," but rather "place of work." The latter is more appropriate in this context, which seems to be a form that is to be filled out. "Workplace" is used to talk about the qualities of the place where someone works, whereas "place of work" is used to indicate the name of the company (WHERE someone works).

Thank you for your help. This is all new to me but I'm having fun learning the language.

I learn something new every day. Thanks James.

Don't we all! Precisamente por eso me gusta el estudiar de los idiomas.

To add to what I said, "workplace" is often used to mean "at work," such as in the following examples.

workplace harassment
smoking in the workplace
workplace violence
injuries and illnesses occurring in the workplace

My turn. )
"Precisamente por eso me gusta el estudio de los idiomas."
or "Precisamente por eso me gusta el estudiar de los idiomas."

Thanks very much, Guillermo.

I understand the changes you made, but it is my understanding that a verb can be used nominally by adding the definite article. I first wrote it exactly as your second version, but then changed it because I wanted to say "I like the studying of languages" rather than "I like studying languages."

Was my version grammatically incorrect, or did it just not sound natural'

James, I'm not really sure if it's gramatically incorrect. It just doesn't sound natural to me.