This is the 7654th most frequent Swedish word.
tbilisi
"Tbilisi" is not a Swedish word; it is the name of the capital city of Georgia.
In this sentence, 'Tbilisi' is used as a proper noun referring to the geographic location which is the capital city.
Tbilisi är huvudstaden i Georgien.
Tbilisi is the capital of Georgia.
Here, 'Tbilisi' is again used as a proper noun to specify the travel destination.
Jag har alltid velat besöka Tbilisi.
I have always wanted to visit Tbilisi.
In this example, 'Tbilisi' is utilized as a proper noun indicating the place where residents express their opinion.