What

The localize option tries to localize already localized strings, breaking the patterns.

Example output of saving TT4 theme using 'Localize Text' option enabled:

<!-- wp:paragraph {"align":"left"} -->
<p class="has-text-align-left"><?php echo __('Experience the fusion of imagination and expertise with Études <?php echo __('Architectural Solutions', 'twentytwentyfour');?>.', 'twentytwentyfour');?></p>
<!-- /wp:paragraph --></div>

Please observe that an echo statement is inside another echo statement, which will result in a parse error. This breaks the pattern where this is included.

Expected

The localize functionality should not try to localize already localized text.