Re: Translated Buddypress, some messages STILL in english..
Ola !
You have 2 translation when running BP. One for WP and one for BP
And many plugins using their own mo file. In this case, the translation is in a “lang” or “languages” folder delivered with the plugin.
The wp translation is called es_ES.mo and is in wp-content/languages/es_ES.mo
The BP mo had to be in this same directory wp-content/languages/buddpress-es_ES.mo
You have also to declare your site language in wp-config.php (define(‘WP_LANG’,’es_ES’) and you have to set this, if not already done, in WP’s settings.
If all this is correctly made, all WP/BP strings should be in spanish. If despite correct settings, you have strings in english, it’s probably because you’re using a theme or a plugin with uninternationalized strings.
The template pack has nothing to do with your problem. bp-template-pack is a kind of guide to help you modify/upset non BP compatible themes. The plugin doesn’t need to be in spanish.
To find exactly where your untranslatable strings are, i suggest you to open buddypress/bp-languages/buddypress.pot and look above the word in english, the file name where the word is used. So simple as that ! 
EDIT: the concerned file is bp-themes/bp-default/members/single/settings/delete-account.php
If you use a custom theme for your install, you have to use the same path:
your_theme/members/single/settings/delete-account.php
In this file, you must have this line 54:
`
`