From 9a1627c2ff2251c2f796d82d4772166876232313 Mon Sep 17 00:00:00 2001
From: Neil <nyamatongwe@gmail.com>
Date: Tue, 20 Apr 2021 12:09:05 +1000
Subject: If text format creation fails, could be because of bad locale so try
 "en-us".

---
 win32/PlatWin.cxx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/win32/PlatWin.cxx b/win32/PlatWin.cxx
index 99c92434b..45523ff6e 100644
--- a/win32/PlatWin.cxx
+++ b/win32/PlatWin.cxx
@@ -313,6 +313,13 @@ struct FontDirectWrite : public FontWin {
 			static_cast<DWRITE_FONT_WEIGHT>(fp.weight),
 			style,
 			DWRITE_FONT_STRETCH_NORMAL, fHeight, wsLocale.c_str(), &pTextFormat);
+		if (hr == E_INVALIDARG) {
+			// Possibly a bad locale name like "/" so try "en-us".
+			hr = pIDWriteFactory->CreateTextFormat(wsFace.c_str(), nullptr,
+				static_cast<DWRITE_FONT_WEIGHT>(fp.weight),
+				style,
+				DWRITE_FONT_STRETCH_NORMAL, fHeight, L"en-us", &pTextFormat);
+		}
 		if (SUCCEEDED(hr)) {
 			pTextFormat->SetWordWrapping(DWRITE_WORD_WRAPPING_NO_WRAP);
 
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