"Kepi taobī rijis."

Translation: The fathers are praising the boys.

[Adrian729689]

Rijis = they praise
Urnesi = they see
Do we have more than one kind of verb then?

[xPsGoDWh]

Yes. It depends on how the verb stem ends. You can see the verb tables at https://wiki.dothraki.org/High_Valyrian_Verb_Tables

[elatrex]

Is there a way to tell the difference between 'dads' and 'fathers'?

[xPsGoDWh]

No.

[Lewis004]

No there is only 1 word. Both answers are correct