It looks like sqlite supports the porter stemming algorithm with FTS5 out of the box. However, at least as of last summer, the joplin devs do not want to move from FTS4 to 5 due to the mobile app dependencies (discussed in this thread).
It looks like sqlite supports the porter stemming algorithm with FTS5 out of the box. However, at least as of last summer, the joplin devs do not want to move from FTS4 to 5 due to the mobile app dependencies (discussed in this thread).