Re-fix #2005

Loading keyval does not work any longer. Fix it properly by de-activating
the equal character locally if graphics options use it.

lib/languages

@@ -1007,6 +1007,7 @@ Language latin
 	GuiName          "Latin"
 	BabelName        latin
 	PolyglossiaName  latin
+	ActiveChars      ^=
 	Encoding         iso8859-15
 	FontEncoding	 T1|OT1
 	LangCode         la_LA
@@ -1471,13 +1472,11 @@ Language turkish
 	BabelName        turkish
 	PolyglossiaName  turkish
 	QuoteStyle       english
+	ActiveChars      =
 	Encoding         iso8859-9
 	FontEncoding	 T1|OT1
 	LangCode         tr_TR
 	DateFormats      "d MMMM yyyy|dd.MMM.yyyy|dd.MM.yyyy"
-	PostBabelPreamble
-	\usepackage{xkeyval}
-	EndPostBabelPreamble
 End
 
 # turkmen must be loaded locally with babel options,

src/insets/InsetGraphics.cpp

@@ -841,18 +841,25 @@ void InsetGraphics::latex(otexstream & os,
 	string before;
 	string after;
 
-	if (runparams.moving_arg)
-		before += "\\protect";
-
-	// We never use the starred form, we use the "clip" option instead.
-	before += "\\includegraphics";
-
 	// Write the options if there are any.
 	bool const ps = runparams.flavor == OutputParams::LATEX
 		|| runparams.flavor == OutputParams::DVILUATEX;
 	string const opts = createLatexOptions(ps);
 	LYXERR(Debug::GRAPHICS, "\tOpts = " << opts);
 
+	if (contains(opts, '=') && contains(runparams.active_chars, '=')) {
+		// We have a language that makes = active. Deactivate locally
+		// for keyval option parsing (#2005).
+		before = "\\begingroup\\catcode`\\=12";
+		after = "\\endgroup";
+	}
+
+	if (runparams.moving_arg)
+		before += "\\protect";
+
+	// We never use the starred form, we use the "clip" option instead.
+	before += "\\includegraphics";
+
 	if (!opts.empty() && !message.empty())
 		before += ('[' + opts + ',' + message + ']');
 	else if (!opts.empty() || !message.empty())