For convenience, code pasted at the bottom of this post for anybody who wants to experiment.
Looking for a way to automatically generate the feminine version of words when it involves simple transformation of the masculine word’s suffix, I’m sticking with my preference of using simple Transclusions with Transclusion templates :
The main tiddler with the content:
\define content()
<table>
<tr><th> Masculin / Masculine </th><td> achalant </td></tr>
<!-- 🟠🟠 Next: the Transclusion with Transclusion template-->
<tr><th> Féminin / Feminine </th><td> {{{ [[achalant]] || msTOfs }}} </td></tr>
</table>
\end
! Approach to deriving the female gender of male words <br> //(when it just involves only altering the ending of the word)//
!!! ''Content of this tiddler''
<pre>
<$text text={{{ [<currentTiddler>get[text]] }}}/>
</pre>
!!! ''Content of {{msTOfs!!title}} tiddler''
<pre>
<$text text={{{ [[msTOfs]get[text]] }}}/>
</pre>
!!! Result
<<content>>
The content of the template tiddler:
<$text text={{{ [<currentTiddler>split[]last[3]join[]match[ant]then<currentTiddler>addsuffix[e]] }}} />