Does the font type and size changes depending on the source and target language?

Font Types

As a rule, font type used in the source file is applied in the translated file too.

However, if the translation language is not supported by the font used in the source file, default font of the Office will be applied.

Font Size

If the source file is a Power Point and it is a Japanese to English translation, the font size in the translated file will be reduced  to maintain the same layout as the source file. 

In other cases the font size in the translated file will be the same as in the source file.