Old Hungarian or Székely script (ISO 15924: Hung) is a historical and renewed script which is still in use to transliterate Hungarian writing, see https://en.wikipedia.org/wiki/Old_Hungarian_script. The writing uses a right-to-left numbering using characters from the Old Hungarian Unicode code page. Automatic numbering is requested by publishing. For example, in the following project: https://demokrata.hu/magyarorszag/az-ige-rovasbetukkel-176140/ (in Hungarian) More information: https://www.researchgate.net/publication/326855248_Sandor_Klara_2017_A_szekely_iras_reneszansza_%27The_Renaissance_of_the_Szekely_Script%27_Budapest_Typotext_311_pp
László Németh committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/f4ca7ea13102dfbc0a62e925b6fe4dbe6fd0bf99 tdf#135573 sw: add Székely rovás (Old Hungarian) numerals It will be available in 7.1.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.