Currently, spell check on Android does not support the Samsung spell checker by default as it only currently supports the Gboard Latin-based IME (see the check for this). Besides modifying this check, support for the Samsung spell checker will require changes to the spell check logic; #119868 and #117167 (comment) describe the case where the spell check results of the Samsung spell checker are being improperly interpreted.

Thus, to support this spell checker:

• Modify the nativeSpellCheckServiceDefined engine parameter to be true when the Samsung spell checker is used.
• Ensure that the Samsung spell checker results can be used to correctly render text.