diff --git a/dlls/dwrite/main.c b/dlls/dwrite/main.c
index a523de0934b..023ae4fa475 100644
--- a/dlls/dwrite/main.c
+++ b/dlls/dwrite/main.c
@@ -256,22 +256,57 @@ static HRESULT WINAPI localizedstrings_FindLocaleName(IDWriteLocalizedStrings *i
     WCHAR const *locale_name, UINT32 *index, BOOL *exists)
 {
     struct localizedstrings *This = impl_from_IDWriteLocalizedStrings(iface);
-    FIXME("(%p)->(%s %p %p): stub\n", This, debugstr_w(locale_name), index, exists);
-    return E_NOTIMPL;
+    UINT32 i;
+
+    TRACE("(%p)->(%s %p %p)\n", This, debugstr_w(locale_name), index, exists);
+
+    *exists = FALSE;
+    *index = ~0;
+
+    for (i = 0; i < This->count; i++) {
+        if (!strcmpiW(This->data[i].locale, locale_name)) {
+            *exists = TRUE;
+            *index = i;
+            break;
+        }
+    }
+
+    return S_OK;
 }
 
 static HRESULT WINAPI localizedstrings_GetLocaleNameLength(IDWriteLocalizedStrings *iface, UINT32 index, UINT32 *length)
 {
     struct localizedstrings *This = impl_from_IDWriteLocalizedStrings(iface);
-    FIXME("(%p)->(%u %p): stub\n", This, index, length);
-    return E_NOTIMPL;
+
+    TRACE("(%p)->(%u %p)\n", This, index, length);
+
+    if (index >= This->count) {
+        *length = (UINT32)-1;
+        return E_FAIL;
+    }
+
+    *length = strlenW(This->data[index].locale);
+    return S_OK;
 }
 
-static HRESULT WINAPI localizedstrings_GetLocaleName(IDWriteLocalizedStrings *iface, UINT32 index, WCHAR *locale_name, UINT32 size)
+static HRESULT WINAPI localizedstrings_GetLocaleName(IDWriteLocalizedStrings *iface, UINT32 index, WCHAR *buffer, UINT32 size)
 {
     struct localizedstrings *This = impl_from_IDWriteLocalizedStrings(iface);
-    FIXME("(%p)->(%u %p %u): stub\n", This, index, locale_name, size);
-    return E_NOTIMPL;
+
+    TRACE("(%p)->(%u %p %u)\n", This, index, buffer, size);
+
+    if (index >= This->count) {
+        if (buffer) *buffer = 0;
+        return E_FAIL;
+    }
+
+    if (size < strlenW(This->data[index].locale)+1) {
+        if (buffer) *buffer = 0;
+        return E_NOT_SUFFICIENT_BUFFER;
+    }
+
+    strcpyW(buffer, This->data[index].locale);
+    return S_OK;
 }
 
 static HRESULT WINAPI localizedstrings_GetStringLength(IDWriteLocalizedStrings *iface, UINT32 index, UINT32 *length)
diff --git a/dlls/dwrite/tests/font.c b/dlls/dwrite/tests/font.c
index dec90fe4041..950377cb02c 100644
--- a/dlls/dwrite/tests/font.c
+++ b/dlls/dwrite/tests/font.c
@@ -2051,14 +2051,16 @@ todo_wine
 static void test_GetFaceNames(void)
 {
     static const WCHAR obliqueW[] = {'O','b','l','i','q','u','e',0};
+    static const WCHAR enus2W[] = {'e','n','-','U','s',0};
     static const WCHAR enusW[] = {'e','n','-','u','s',0};
     IDWriteLocalizedStrings *strings, *strings2;
     IDWriteGdiInterop *interop;
     IDWriteFactory *factory;
+    UINT32 count, index;
     IDWriteFont *font;
     LOGFONTW logfont;
     WCHAR buffW[255];
-    UINT32 count;
+    BOOL exists;
     HRESULT hr;
 
     factory = create_factory();
@@ -2087,13 +2089,22 @@ static void test_GetFaceNames(void)
     count = IDWriteLocalizedStrings_GetCount(strings);
     ok(count == 1, "got %d\n", count);
 
+    index = 1;
+    exists = FALSE;
+    hr = IDWriteLocalizedStrings_FindLocaleName(strings, enus2W, &index, &exists);
+    ok(hr == S_OK, "got 0x%08x\n", hr);
+    ok(index == 0 && exists, "got %d, %d\n", index, exists);
+
+    count = 0;
+    hr = IDWriteLocalizedStrings_GetLocaleNameLength(strings, 1, &count);
+    ok(hr == E_FAIL, "got 0x%08x\n", hr);
+    ok(count == ~0, "got %d\n", count);
+
     /* for simulated faces names are also simulated */
     buffW[0] = 0;
     hr = IDWriteLocalizedStrings_GetLocaleName(strings, 0, buffW, sizeof(buffW)/sizeof(WCHAR));
-todo_wine {
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(!lstrcmpW(buffW, enusW), "got %s\n", wine_dbgstr_w(buffW));
-}
 
     buffW[0] = 0;
     hr = IDWriteLocalizedStrings_GetString(strings, 0, buffW, sizeof(buffW)/sizeof(WCHAR));