I have similar settings for Netsurf on Iyonix and ARMX6 and, for example, a UTF-8 encoded file of Cyrillic characters displays correctly on both. But Wikipedia's nav bar language lists differ.
Having deleted RUfl_cache, Iyonix shows all correctly except Georgian ARMX6 showed all correctly except Korean, Japanese, Thai and Chinese until I deleted RUfl_cache, and now shows none of the non-Latin scripts. Why the differences? Indeed how come only Acorn fonts are apparently needed in Netsurf Choices? Setups are: Iyonix OS 5.24 ARMX6 OS 5.25 (25-Apr-2018) FontManager 3.79 FontDir Pro 3.23 (ARMX6 only) Netsurf 3.10 (Dev CI #4851) Netsurf Choices Fonts: - Homerton - Trinity - Corpus - Sassoon - Pembroke - Sans-serif Unicode fonts available (but not specified to Netsurf) include: - Cyberbit - DejaVu (ARMX6 only) -- Bernard