Not so. They are supported in multiple fonts and can be inserted via a suitably-configured keyboard or via the appropriate Unicode character sequences. I have inserted a considerable amount of Hebrew (and Greek) text into Word documents and Excel workbooks, along with their English meanings.
Your original post made no mention of Inkscape, which is a is a vector graphics editor. Inkscape's limitations have nothing to do with Word.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]