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Asked: 2026-05-14T08:42:28+00:00

I need to turn spellcheck on for a richtextbox, and set the language to

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I need to turn spellcheck on for a richtextbox, and set the language to one the user has picked from a drop down. For now, I’m just testing it by building the richtextbox in xaml and providing a language to the xaml language attribute.

I’ve read two different resources and one says I need to set the language attribute, and the other says I need to set the xml:lang attribute. Neither seems to work. I’ve tried setting either one to “es” for Spanish, and I’ve also tried setting both to “es”. I’ve also tried french by setting them to “fr-FR”, without success. The only thing that happens is that english words aren’t marked, but the other language words are marked as misspelled.

I also read that I need to change the keyboard language. This would be a problem for my application as the language within the application needs to be switched on the fly, so having the end user go to their keyboard settings just so spellcheck will work is a problem. However, I’ve changed my keyboard settings, and spell check still does not work properly. This time it doesn’t mark anything as misspelled, even misspelled english words.

What am I missing?

Edit:
some links to my references above
http://msdn.microsoft.com/en-us/library/system.windows.controls.spellcheck(v=VS.100).aspx

http://www.dev102.com/2008/03/25/customize-spellcheck-on-wpf-text-controls/

http://books.google.com/books?id=clLc5BBHqRMC&pg=PA121&lpg=PA121&dq=C%23+wpf+enable+spellcheck&source=bl&ots=_r59pZRDjP&sig=yHMBc39EHKK5gaRMzxlBaEsY890&hl=en&ei=oXnIS8zWH4G88gaq48yGBw&sa=X&oi=book_result&ct=result&resnum=6&ved=0CBMQ6AEwBQ#v=onepage&q&f=false

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1 Answer

  1. Editorial Team

    From the MSDN forum:

    “First, we exactly components do we need for WPF to enable spell check for English/Spanish/German/French languages?

    NetFx 3.5 SP1

    Windows XP (Language Packs); Windows Vista (Out of box); Windows 7 (Out of box)

    NetFx 4
    Windows XP (Language Packs); Windows Vista (Language Packs); Windows 7 (Language Packs)

    Here ‘Language Packs’ means you need to install corresponding .NET Framework Language Packs. For example, if you want to enable Spanish spell check on Windows XP and .NET Framework 3.5 SP1, then you install the .NET Framework 3.5 SP1 Spanish Language Pack. And if you want to enable German spell check on .NET Framework 4.0, then you install the .NET Framework 4.0 German Language Pack.

    The Language Packs for .NET Framework 4.0 will be available soon.

    Out of box means you don’t have to do anything and the spell check for the four languages are automatically available.

    If you’re deploying your application via ClickOnce, you can include the corresponding language packs as prerequisites. For help on including language packs in a ClickOnce deployment, you can use the ClickOnce and Setup & Deployment Projects Forum.

    Second, how does RichTextBox control determine the language to check?

    If a Run element is marked with specific language, spell check will use it:

    uno dos tres cuatrro

    one two three fourr

    At runtime, the spell check uses the input language that was used to type in the words, as described in previous post.

    http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/06a2cc61-f2ae-4534-b35a-6c676bc2bcb2/?prof=required

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