There is a repeated formula in which a number is embedded. It starts out with the fairly obvious 4 and 5, represented by hash marks, then 6 by the glyph CY, 7 and 8 by CY I and CY I I, then 9 with LT, 10 with T, and eleven with IX.
Given the similarity between the number 6 and the first glyph of the phrase "King of the Jews", and the fact that the glyph for 11 could also represent the word "and", we can come up with some more fuzzy arguments about the underlying language of the text.
Hypothesis A: The glyph CY represents the number "six" and is phonologically similar to the glyph CX as part of the phrase "King of the Jews"
|Language||King of the Jews||Value for CX||Value for CY|
|Koine Greek||βασιλεὺς τῶν Ἰουδαίων||b[a]||ἕξ|
|Albanian||o mbret i Judenjve||m[bre]||gjashtë|
|Old Church Slavonic||Царю Иудейский||ts[a]||šestĭ|
|Kalderash Romani||zhidovengo thagar||zh[i]||shov|
|Dutch||De koning van de Joden||k[o]||zes|
Hypothesis B: The glyph IX represents the number "eleven" as well as the word "and", and the two words have some similarity. In this table I include also the number "one", in case the connection is that "eleven" is derived from "one", and "and" sounds like "one".
|Old Church Slavonic||ѥдинъ на десѧте||ѥдинъ||и|
|Romanian||unsprezece, unșpe, unsprăd̦ațe||unu||și|
|Kalderash Romani||dešujek||jek||khaj, thaj|
I added Dutch into the list because of the similarity between "one" and "and".