How to get LanguageTable in runtime

Hi there,
Is there some way to get LanguageTable in Runtime? I have tried few thinks, but no luck so far. Any tip?

My AddIn project is "IProjectServiceExtension".

Code:

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ILanguageTable languageTable = m_Project.Parent.Parent.Workspace.ActiveProject.LanguageTable;

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Code:

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ILanguageTable languageTable = m_Project.LanguageTable;

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Both returning null.

Any help appreciated.

Regards, Jaroslav