Thomas,
If you use Unicode fonts (most OTF fonts), they automatically contain the characters you need.
Attention! Unicode and OpenType are only "formats". It's up to the designer(s) of the font which glyphs to include and which not. It's absolutely fine to create a Unicode OTF font that only covers the glyphs for "western" languages. And there are enough OpenType fonts out there with no support for e.g. central European languages.
Beside this, I suggest to not use old (non-unicode) Type1 Fonts in a Unicode Environment like FrameMaker 8 or InDesign.
I suggest to carefully check the preferred font for the languages covered. You can check this with your font vendor or check for consulting of a specialist for multilingual publishing ;-)