patch 9.0.0960: error when using the "Spelling / Find More Languages" menu

Problem:    Error when using the "Tools / Spelling / Find More Languages"
            menu.
Solution:   Remove "<SID>".  Reset "g:menutrans_set_lang_to" when 'encoding'
            changes. (closes #11625)

runtime/menu.vim

@@ -474,7 +474,7 @@ if has("spell")
   an <silent> 40.335.270 &Tools.&Spelling.&Find\ More\ Languages	:call <SID>SpellLang()<CR>
 
   let s:undo_spelllang = ['aun &Tools.&Spelling.&Find\ More\ Languages']
-  def s:SpellLang()
+  def s:SpellLang(encChanged = false)
     for cmd in s:undo_spelllang
       exe "silent! " .. cmd
     endfor
@@ -482,7 +482,8 @@ if has("spell")
 
     var enc = &enc == "iso-8859-15" ? "latin1" : &enc
 
-    if !exists("g:menutrans_set_lang_to")
+    # Reset g:menutrans_set_lang_to when called for the EncodingChanged event.
+    if !exists("g:menutrans_set_lang_to") || encChanged
       g:menutrans_set_lang_to = 'Set Language to'
     endif
 
@@ -510,12 +511,12 @@ if has("spell")
     else
       echomsg "Found " .. found .. " more spell files"
     endif
+
     # Need to redo this when 'encoding' is changed.
     augroup spellmenu
-    au! EncodingChanged * call <SID>SpellLang()
+    au! EncodingChanged * call SpellLang(true)
     augroup END
   enddef
-
 endif
 
 " Tools.Fold Menu

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    960,
 /**/
     959,
 /**/