If you want to include in your document passages of text in a language that uses non-Latin characters (such as many oriental languages, among others) you may find the Text Input Tool useful.
From the File menu of your document, choose Language and then select the language you want to use, if listed.
If support is available for that language, a new icon will appear to the right-hand end of the toolbar. Clicking on this will offer support for entering text using phonetic typing, a virtual keyboard (or more than one), or even (for some languages) handwriting input.
With the phonetic input method selected, just type the phonetic spelling of a word using Latin characters, and the tool will provide you with a numbered list of word choices from which you can select the desired word.
Selecting the keyboard option will place a virtual keyboard on your screen. You can drag it with the mouse to a suitable place in the browser and type on it using the mouse:
Finally, the Handwriting Input Tool available for some languages even lets you hand-write the required character, and will offer you some possible options from which to select:
Go back into File > Language and reset the document to its original language to turn off these options.