[i18n] set decimal point based on language

Signed-off-by: R4SAS <r4sas@i2pmail.org>

i18n/I18N.cpp

@@ -1,11 +1,12 @@
 /*
-* Copyright (c) 2021-2022, The PurpleI2P Project
+* Copyright (c) 2021-2023, The PurpleI2P Project
 *
 * This file is part of Purple i2pd project and licensed under BSD3
 *
 * See full license text in LICENSE file at top of project tree
 */
 
+#include <clocale>
 #include "ClientContext.h"
 #include "I18N_langs.h"
 #include "I18N.h"
@@ -18,9 +19,15 @@ namespace i18n
 	{
 		const auto it = i2p::i18n::languages.find(lang);
 		if (it == i2p::i18n::languages.end()) // fallback
+		{
 			i2p::client::context.SetLanguage (i2p::i18n::english::GetLocale());
+			setlocale(LC_NUMERIC, "english");
+		}
 		else
+		{
 			i2p::client::context.SetLanguage (it->second.LocaleFunc());
+			setlocale(LC_NUMERIC, lang.c_str()); // set decimal point based on language
+		}
 	}
 
 	std::string translate (const std::string& arg)