Use _ex() and _x() comments for accessibility strings

[slaFFik]

Second parameter will give ability to identify, that this text is for accessibility purpose, so can be a bit lengthy.

So this:

<h2 class="bp-screen-reader-text"><?php _e( 'Manage Members', 'buddypress' ); ?></h2>

will become:

<h2 class="bp-screen-reader-text"><?php _ex( 'Manage Members', 'Accessibility text', 'buddypress' ); ?></h2>

That's a help for translators.

[slaFFik]

_ex() and _x() are for different purpose, should not be used in this use case. Closing as invalid. @mercime did everything right :)