The first thing to be decided in an IDE is the language that will be used, for beginners it may be easier to choose Portuguese, but it is a dangerous comfort zone, because when looking for help from others in forums and mailing lists you will notice that many – especially Brazilian programmers – have a preference for English. This can be explained because in general the documentation is plentiful in English and if we want to progress in this field we must specialize in using this language, so choosing the appropriate language is important.
Go inTools|Options|Environment|General|Language:
Confirm the change and then restart Lazarus to enjoy the chosen language.
note: If you choose Portuguese, no problem, just know that you can mature more if you learn a little English.