LyX ⇒ Renewcommand and font problem

[Aleks]

Hello! I am writing my thesis in Lyx, however I have encountered several problems.

1. Renewcommand in the preamble doesn't do anything in regards to changing part, chapter etc. to my language (Macedonian) counterparts. In TexStudio it is working properly.

2. I am obliged to use a specific Georgia based font. In Word processors like MS Word, LibreOffice Writer etc. the font is working properly, but in LaTex (Lyx, TexStudio) bold and italic features are lacking.

I am using bookclass, Lyx version 2.3.2, Ubuntu 16.04

EDIT: I solved the first part of the problem. It was the babel package. I set the language package to none in preferences.

[Johannes_B]

If you want to use a system font, you should probably use package fontspec along with XeTeX or LuaTeX.
Would be horrible with pdfTeX.