Math & Science ⇒ Change the Theorem, Lemma, etc evironment

[pdela]

I would like to use a environment similar to Theorem or Lemma.
But I want to change it a bit so it could be read as Teorema o Lema in spanish,
or use another word as Principio. I want to ask if it would be posible to change this or even better, give me tips to define the environment from the beggining, taking Theorem environment as the model

[frabjous]

Take a look at something like the amsthm or ntheorem packages, and read their documentation.

[pdela]

yup, I found it, I think i'll manage to do it, I'll not mark this as solved yet, just in case I have another cuestion on this