From the official web site of the Unicode Consortium, below :

http://www.unicode.org/charts/

We can get a PDF list of all the Sinhala characters, in the range [\x{0D80}-\x{0DFF}], from the link, below :

http://www.unicode.org/charts/PDF/U0D80.pdf

It’s easy to verify that :

• The Unicode value 0D8D corresponds to the SINHALA LETTER IRUYANNA ඍ ( = sinhala letter vocalic r )

• The Unicode value 0D8E corresponds to the SINHALA LETTER IRUUYANNA ඎ ( = sinhala letter vocalic rr )

which are, both, independent vowels

And, you’ll also notice that :

• The Unicode value 0DB4 corresponds to the SINHALA LETTER ALPAPRAANA PAYANNA ප ( = sinhala letter pa )

which is a consonant

Finally, you’ll remark that :

• The Unicode value 0DD8 corresponds to the SINHALA VOWEL SIGN GAETTA-PILLA ෘ ( = sinhala vowel sign vocalic r )

• The Unicode value 0DF2 corresponds to the SINHALA VOWEL SIGN DIGA GAETTA-PILLA ෲ ( = sinhala vowel sign vocalic rr )

with a type, different as the above characters, as they are, both, dependent vowel signs

Unfortunately, as I’m French and, as I, absolutely, not used to Asiatic languages, I cannot deduce anything valuable, from these facts :-(( Hope that these tiny hints will make sense, for you !!

Note that you can search for, any of your alphabet character, with the syntax \x{0Dhh} ( where lowercase h stands for an hexdecimal digit )

BTW, which encoding do you use ? Look at the right part of the bottom status bar

Also, what is your current font name ?

• Open the menu option Settings - Style Configurator…
• Select the Global Styles language
• Select the Default Style style
• See the current font name, on the right, in the Font style zone

Best Regards,

guy038

P.S. :

Beware ! The glyphs of the two additional dependent vowel signs, (\x{0DF2} and \x{0DF3} ) in the PDF file, are reversed :-((