If you do not often need to type some unusual characters, but not often enough to install a specialized keyboard - the right tool is that.
You place the cursor in your document, click on the appropriate button NationalCharacters - and done.
The program comes with the following easy-to-edit, predefined character sets:
^ASCII, Arrows, Bulgarian, Croatian, Culture, Currencies, Czech, Danish, Engineering, Estonian, Filename, Finnish, Fraction, French, Fullwidth, Georgian, German, Grave, Greek, Hebrew, Hungarian, Icelandic, Irish, Italian, Latvian, Lithuanian, Math, Norwegian, Polish, Portuguese, Quotes, Roman, Romanian, Runic, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Text, Turkish, Ukrainian, Vietnamese, Weather