doc: add question about unicode chars and libc (wcwidth) in FAQ

doc/de/weechat_faq.de.asciidoc

@@ -124,6 +124,19 @@ Für Weechat wird die Nutzung von UTF-8 locale empfohlen. Nutzt Du jedoch ISO
 oder andere locale, bitte vergewissere Dich, dass *alle* Deine Einstellungen
 (Terminal, screen, ...) sich auch auf ISO beziehen und *nicht* auf UTF-8.
 
+// TRANSLATION MISSING
+[[unicode_chars]]
+=== Some unicode chars are displayed in terminal but not in WeeChat, why?
+
+This may be caused by a libc bug in function 'wcwidth', which should be fixed
+in glibc 2.22 (maybe not yet available in your distribution).
+
+There is a workaround to use the fixed 'wcwidth' function:
+https://blog.nytsoi.net/2015/05/04/emoji-support-for-weechat
+
+See this bug report for more information:
+https://github.com/weechat/weechat/issues/79
+
 [[bars_background]]
 === Weshalb haben Bars, z.B. Titel und Status, keine Hintergrundfarbe bzw. diese endet direkt nach dem Text?
 

doc/en/weechat_faq.en.asciidoc

@@ -108,6 +108,18 @@ UTF-8 locale is recommended for WeeChat. If you're using ISO or other
 locale, please check that *all* your settings (terminal, screen, ..) are ISO
 and *not* UTF-8.
 
+[[unicode_chars]]
+=== Some unicode chars are displayed in terminal but not in WeeChat, why?
+
+This may be caused by a libc bug in function 'wcwidth', which should be fixed
+in glibc 2.22 (maybe not yet available in your distribution).
+
+There is a workaround to use the fixed 'wcwidth' function:
+https://blog.nytsoi.net/2015/05/04/emoji-support-for-weechat
+
+See this bug report for more information:
+https://github.com/weechat/weechat/issues/79
+
 [[bars_background]]
 === Bars like title and status are not filled, background color stops after text, why?
 

doc/fr/weechat_faq.fr.asciidoc

@@ -113,6 +113,19 @@ La locale UTF-8 est recommandée pour WeeChat. Si vous utilisez ISO ou une autre
 locale, assurez-vous que *tout* soit configuré en ISO (terminal, screen, ...)
 et *pas* en UTF-8.
 
+[[unicode_chars]]
+=== Certains caractères unicode sont affichés dans le terminal, mais pas dans WeeChat, pourquoi ?
+
+Cela peut être causé par un bug de la libc dans la fonction 'wcwidth' et
+devrait être corrigé dans la glibc 2.22 (peut-être pas encore disponible dans
+votre distribution).
+
+Il y a un moyen de contournement pour utiliser la fonction 'wcwidth' corrigée :
+https://blog.nytsoi.net/2015/05/04/emoji-support-for-weechat
+
+Voir ce rapport de bug pour plus d'informations :
+https://github.com/weechat/weechat/issues/79
+
 [[bars_background]]
 === Des barres telles que le titre et le statut ne sont pas remplies, la couleur de fond s'arrête après le texte, pourquoi ?
 

doc/it/weechat_faq.it.asciidoc

@@ -122,6 +122,19 @@ Si raccomanda il locale UTF-8 per WeeChat. Se si utilizza ISO o un altro
 locale, per favore verificare che *tutte* le impostazioni (terminale, screen)
 siano ISO e *non* UTF-8.
 
+// TRANSLATION MISSING
+[[unicode_chars]]
+=== Some unicode chars are displayed in terminal but not in WeeChat, why?
+
+This may be caused by a libc bug in function 'wcwidth', which should be fixed
+in glibc 2.22 (maybe not yet available in your distribution).
+
+There is a workaround to use the fixed 'wcwidth' function:
+https://blog.nytsoi.net/2015/05/04/emoji-support-for-weechat
+
+See this bug report for more information:
+https://github.com/weechat/weechat/issues/79
+
 [[bars_background]]
 === Barre come quella del titolo e di stato non sono complete, il colore di sfondo si ferma dopo il testo, perché?
 

doc/ja/weechat_faq.ja.asciidoc

@@ -112,6 +112,19 @@ WeeChat は UTF-8 ロケールを推奨します。ISO 又はその他のロケ
 *全ての* 設定 (ターミナル、screen、..) が ISO であり、
 UTF-8 *でない* ことを確認してください。
 
+// TRANSLATION MISSING
+[[unicode_chars]]
+=== Some unicode chars are displayed in terminal but not in WeeChat, why?
+
+This may be caused by a libc bug in function 'wcwidth', which should be fixed
+in glibc 2.22 (maybe not yet available in your distribution).
+
+There is a workaround to use the fixed 'wcwidth' function:
+https://blog.nytsoi.net/2015/05/04/emoji-support-for-weechat
+
+See this bug report for more information:
+https://github.com/weechat/weechat/issues/79
+
 [[bars_background]]
 === タイトルやステータスバー等の背景色が行末ではなくテキストの最後で終わってしまいます。
 

doc/pl/weechat_faq.pl.asciidoc

@@ -113,6 +113,19 @@ UTF-8 jest zalecany dla WeeChat. Jeśli korzystasz z lokalizacji ISO lub innych,
 sprawdź czy *wszystkie* twoje ustawienia (terminal, screen, ..) są ISO,
 a *nie* UTF-8.
 
+// TRANSLATION MISSING
+[[unicode_chars]]
+=== Some unicode chars are displayed in terminal but not in WeeChat, why?
+
+This may be caused by a libc bug in function 'wcwidth', which should be fixed
+in glibc 2.22 (maybe not yet available in your distribution).
+
+There is a workaround to use the fixed 'wcwidth' function:
+https://blog.nytsoi.net/2015/05/04/emoji-support-for-weechat
+
+See this bug report for more information:
+https://github.com/weechat/weechat/issues/79
+
 [[bars_background]]
 === Paski jak tytuł i status nie są filtrowane, kolor tła zatrzymuje się po tekście, czemu?