diff --git a/docs/po/ru.po b/docs/po/ru.po
index a4aed8c8657..bf4f24f52f7 100644
--- a/docs/po/ru.po
+++ b/docs/po/ru.po
@@ -94,7 +94,7 @@ msgstr ""
 #: src/user/user-foreword.adoc:1 src/user/user-intro.adoc:1 README.adoc:1
 #: INSTALL.adoc:1
 msgid "en"
-msgstr "en"
+msgstr "ru"
 
 #. type: Title =
 #: src/Master_Developer.adoc:6
diff --git a/docs/po/uk.po b/docs/po/uk.po
index ab63a91c0fd..9f8645eb6c9 100644
--- a/docs/po/uk.po
+++ b/docs/po/uk.po
@@ -91,7 +91,7 @@ msgstr ""
 #: src/user/user-foreword.adoc:1 src/user/user-intro.adoc:1 README.adoc:1
 #: INSTALL.adoc:1
 msgid "en"
-msgstr "en"
+msgstr "uk"
 
 #. type: Title =
 #: src/Master_Developer.adoc:6
diff --git a/docs/src/Submakefile b/docs/src/Submakefile
index 1e6cc85b64f..b023f7f26c4 100644
--- a/docs/src/Submakefile
+++ b/docs/src/Submakefile
@@ -805,6 +805,7 @@ $(DOC_OUT_HTML)/$(1)/man/%.html: $(2)/% $(DOC_SRCDIR)/docinfo.html $(DOC_SRCDIR)
 			-a compat-mode \
 			-a mansource=LinuxCNC \
 			-a manmanual='LinuxCNC Documentation' \
+			-a "lang=$(1)" \
 			-a "lcnc-cssrel=../../../" \
 			-a "lcnc-lang-label=$(LANG_LABEL_$(1))" \
 			-a "lcnc-subpath=$$(patsubst $(DOC_OUT_HTML)/$(1)/%,%,$$@)" \