so that the database is well filled with the accents it is necessary to put

$ conn = mysqli_connect ($ DB_HOST, $ DB_USERNAME, $ DB_PASSWORD, $ DB_NAME) or die ("Unable to select database:". mysqli_error ());

mysqli_set_charset ($ conn, 'utf8');

for the site it is necessary

in php

  ini_set ('default_charset', 'UTF-8');

in html

<meta http-equiv = "content-type" content = "text / html; charset = UTF-8" />

for some chain

$ string = utf8_encode (string with accents);

By default, the installation works perfectly accentuation, only when I modify the language of a plugin

I use the "WordPad" program to edit plugin language, after edited, send that way again to the server, is this the error? which file is used in a plugin?

@lorena Use Notepad++

Set up it: Go to 'Encoding' tab menu -> Check on 'Encode in UTF-8 without BOM'

Use this option ALWAYS when editing/creating .php file

Learn this also

Look at these plugins too:

• https://elgg.org/plugins/385116
• https://elgg.org/plugins/1272422

editeur PSPAD editor 

format utf8

Okay. I'm going to try this and I come back to finish the topic, I tried the adobe dreamweaver and it did not work, continued with the accent error

Ready! sorted out!! Many thanks for the support. using notepad ++ converts the accents perfectly.