diff --git a/po/LINGUAS b/po/LINGUAS
index e69de29..841618a 100644
--- a/po/LINGUAS
+++ b/po/LINGUAS
@@ -0,0 +1 @@
+cs
diff --git a/po/POTFILES b/po/POTFILES
index 8df8036..a0f2862 100644
--- a/po/POTFILES
+++ b/po/POTFILES
@@ -1,6 +1,5 @@
 data/cz.ogion.Nonemast.desktop.in
 data/cz.ogion.Nonemast.appdata.xml.in
-data/cz.ogion.Nonemast.gschema.xml
 src/nonemast/main.py
 src/nonemast/update-details.ui
 src/nonemast/update-details-commit-item.ui
diff --git a/po/cs.po b/po/cs.po
new file mode 100644
index 0000000..2afabb8
--- /dev/null
+++ b/po/cs.po
@@ -0,0 +1,157 @@
+# Czech translations for nonemast package.
+# Copyright (C) 2023 THE nonemast'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the nonemast package.
+# Automatically generated, 2023.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: nonemast\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2023-09-16 23:19+0200\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: Automatically generated\n"
+"Language-Team: none\n"
+"Language: cs\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=3; plural=(n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2;\n"
+
+#: data/cz.ogion.Nonemast.desktop.in:3 src/nonemast/main.py:58
+#: src/nonemast/window.ui:21
+msgid "Not Nearly Enough Masking Tape"
+msgstr "Ani zdaleka ne dost maskovací pásky"
+
+#: data/cz.ogion.Nonemast.appdata.xml.in:7
+msgid "Tool for reviewing GNOME update Nixpkgs PRs."
+msgstr ""
+"Nástroj pro kontrolu požadavků na začlenění do Nixpkgs obsahujících "
+"aktualizace GNOME."
+
+#: data/cz.ogion.Nonemast.appdata.xml.in:12
+msgid "Main view of GNOME 43 update"
+msgstr "Hlavní pohled na aktualizaci GNOME 43"
+
+#: src/nonemast/main.py:39
+msgid "error: nonemast expects exactly one path as an argument."
+msgstr "chyba: nonemast očekává právě jednu cestu jako argument."
+
+#: src/nonemast/main.py:63
+msgid "translator-credits"
+msgstr "Jan Tojnar"
+
+#: src/nonemast/main.py:64
+msgid "© 2022 Jan Tojnar"
+msgstr "© 2022 Jan Tojnar"
+
+#: src/nonemast/update-details.ui:7
+msgid "Changelog"
+msgstr "Seznam změn"
+
+#: src/nonemast/update-details.ui:34
+msgid "Mark as reviewed"
+msgstr "Označit jako zkontrolované"
+
+#: src/nonemast/update-details.ui:48
+msgid "Final commit message"
+msgstr "Výsledná zpráva revize"
+
+#: src/nonemast/update-details.ui:82
+msgid "Edit"
+msgstr "Upravit"
+
+#: src/nonemast/update-details.ui:97
+msgid "Currently editing"
+msgstr "Přávě upravováno"
+
+#: src/nonemast/update-details.ui:108
+msgid "Commits"
+msgstr "Revize"
+
+#: src/nonemast/update-details-commit-item.ui:26
+msgid "View in external tool"
+msgstr "Zobrazit v externím nástroji"
+
+#: src/nonemast/update-item.ui:34
+msgid "Changelog reviewed"
+msgstr "Změny zkontrolovány"
+
+#: src/nonemast/window.py:56
+msgid "Unable to find a text editor for editing commit messages."
+msgstr "Nelze najít textový editor pro úpravu zpráv revizí."
+
+#: src/nonemast/window.py:80
+msgid "Unable to find a tool for viewing Git commits."
+msgstr "Nelze najít nástroj pro zobrazování revizí Gitu."
+
+#: src/nonemast/window.py:336
+msgid "Missing Git Identity"
+msgstr "Chybějící totožnost pro Git."
+
+#: src/nonemast/window.py:338
+#, python-format
+msgid ""
+"Please %(your_identity_link_start)s configure Git with your name and e-mail "
+"address %(your_identity_link_end)s for commit authorship."
+msgstr ""
+
+#: src/nonemast/window.py:346
+msgid ""
+"https://www.git-scm.com/book/en/v2/Getting-Started-First-Time-Git-"
+"Setup#_your_identity"
+msgstr ""
+"https://www.git-scm.com/book/cs/v2/%C3%9Avod-Prvn%C3%AD-nastaven%C3%AD-"
+"syst%C3%A9mu-Git#_va%C5%A1e_toto%C5%BEnost"
+
+#: src/nonemast/window.py:376
+msgid "Error Creating a Commit"
+msgstr ""
+
+#: src/nonemast/window.py:433
+#, python-format
+msgid "Could not find a Git remote with URL “%(remote_url)s”."
+msgstr ""
+
+#: src/nonemast/window.ui:29
+msgid "Search"
+msgstr ""
+
+#: src/nonemast/window.ui:36
+msgid "Filter"
+msgstr "Filtr"
+
+#: src/nonemast/window.ui:66
+msgid "Loading commits…"
+msgstr "Načítání revizí…"
+
+#: src/nonemast/window.ui:79
+msgid "Error obtaining commit list."
+msgstr "Chyba získávání seznamu revyzí"
+
+#: src/nonemast/window.ui:179
+msgid "No updates selected."
+msgstr "Nevybrány žádné aktualizace"
+
+#: src/nonemast/window.ui:215
+msgid "Ensure _Co-authors"
+msgstr "Vynutit spolu_autorství"
+
+#: src/nonemast/window.ui:221
+msgid "_Keyboard Shortcuts"
+msgstr "_Klávesové zkratky"
+
+#: src/nonemast/window.ui:225
+msgid "_About Not Nearly Enough Masking Tape"
+msgstr "_O programu Nonemast"
+
+#: src/nonemast/window.ui:233
+msgid "_All"
+msgstr "_Vše"
+
+#: src/nonemast/window.ui:238
+msgid "_Reviewed"
+msgstr "Z_kontrolováno"
+
+#: src/nonemast/window.ui:243
+msgid "_Unreviewed"
+msgstr "_Nezkontrolováno"
diff --git a/po/meson.build b/po/meson.build
index d76dcca..5b62224 100644
--- a/po/meson.build
+++ b/po/meson.build
@@ -4,4 +4,8 @@
 i18n.gettext(
   'nonemast',
   preset: 'glib',
+  args: [
+    '--no-wrap',
+    '--width=500',
+  ],
 )
diff --git a/src/nonemast/main.py b/src/nonemast/main.py
index 9006e7a..a5abaf8 100644
--- a/src/nonemast/main.py
+++ b/src/nonemast/main.py
@@ -3,6 +3,7 @@
 
 import sys
 
+from gettext import gettext as _
 from gi.repository import Adw
 from gi.repository import Ggit
 from gi.repository import Gio
@@ -35,7 +36,7 @@ def do_activate(self, repo_path: Optional[Gio.File] = None) -> None:
 
     def do_open(self, files: Sequence[Gio.File], n_files: int, hint: str) -> None:
         if n_files != 1:
-            sys.exit("error: nonemast expects exactly one path as an argument.")
+            sys.exit(_("error: nonemast expects exactly one path as an argument."))
 
         self.do_activate(repo_path=files[0])
 
@@ -54,12 +55,13 @@ def on_about_action(
         """Callback for the app.about action."""
         about = Adw.AboutWindow(
             transient_for=self.props.active_window,
-            application_name="Not Nearly Enough Masking Tape",
+            application_name=_("Not Nearly Enough Masking Tape"),
             application_icon="cz.ogion.Nonemast",
             license_type=Gtk.License.MIT_X11,
             version=self.version,
             developers=["Jan Tojnar"],
-            copyright="© 2022 Jan Tojnar",
+            translator_credits=_("translator-credits"),
+            copyright=_("© 2022 Jan Tojnar"),
         )
         about.present()
 
diff --git a/src/nonemast/package_update.py b/src/nonemast/package_update.py
index 59a1991..1c54b4d 100644
--- a/src/nonemast/package_update.py
+++ b/src/nonemast/package_update.py
@@ -1,6 +1,7 @@
 # SPDX-FileCopyrightText: 2022 Jan Tojnar
 # SPDX-License-Identifier: MIT
 
+from gettext import gettext as _, ngettext
 from gi.repository import Ggit
 from gi.repository import Gio
 from gi.repository import GLib
@@ -107,11 +108,11 @@ def description(self):
             )
 
             num_deltas = diff.get_num_deltas()
-            return (
-                f"{num_deltas} delta in diff"
-                if num_deltas == 1
-                else f"{num_deltas} deltas in diff"
-            )
+            return ngettext(
+                "%(num_deltas)d delta in diff",
+                "%(num_deltas)d deltas in diff",
+                num_deltas,
+            ) % {"num_deltas": num_deltas}
 
         return ""
 
@@ -195,7 +196,7 @@ def add_commit(self, commit: Ggit.Commit) -> None:
         )
         url = find_changelog_link(self._message_lines)
         if url is None:
-            self.props.changelog_link = "No changelog detected."
+            self.props.changelog_link = _("No changelog detected.")
         else:
             url = try_getting_corresponding_github_link(url)
             self.props.changelog_link = (
diff --git a/src/nonemast/window.py b/src/nonemast/window.py
index 30ce418..f51bc59 100644
--- a/src/nonemast/window.py
+++ b/src/nonemast/window.py
@@ -52,7 +52,8 @@ def open_commit_message_in_editor(parent: Gtk.Window, path: Path) -> None:
 
         def show_error():
             make_error_dialog(
-                parent, "Unable to find a text editor for editing commit messages."
+                parent,
+                _("Unable to find a text editor for editing commit messages."),
             ).show()
 
         GLib.idle_add(show_error)
@@ -75,7 +76,8 @@ def view_commit_in_vcs_tool(
 
     if viewer is None:
         make_error_dialog(
-            parent, "Unable to find a tool for viewing Git commits."
+            parent,
+            _("Unable to find a tool for viewing Git commits."),
         ).show()
     else:
         subprocess.run(viewer, cwd=repo_path.get_path())
@@ -331,8 +333,19 @@ def make_git_signature(self) -> Optional[Ggit.Signature]:
         except:
             make_error_dialog(
                 parent=self,
-                text="Missing Git Identity",
-                secondary_text="Please <a href='https://www.git-scm.com/book/en/v2/Getting-Started-First-Time-Git-Setup#_your_identity'>configure Git with your name and e-mail address</a> for commit authorship.",
+                text=_("Missing Git Identity"),
+                secondary_text=_(
+                    "Please %(your_identity_link_start)s configure Git with your name and e-mail address %(your_identity_link_end)s for commit authorship."
+                )
+                % {
+                    "your_identity_link_start": "<a href='%(your_identity_url)s'>",
+                    "your_identity_link_end": "</a>",
+                }
+                % {
+                    "your_identity_url": _(
+                        "https://www.git-scm.com/book/en/v2/Getting-Started-First-Time-Git-Setup#_your_identity"
+                    )
+                },
                 secondary_use_markup=True,
             ).show()
 
@@ -360,7 +373,7 @@ def create_empty_commit(
         except GLib.Error as error:
             make_error_dialog(
                 parent=self,
-                text="Error Creating a Commit",
+                text=_("Error Creating a Commit"),
                 secondary_text=error.message,
             ).show()
 
@@ -417,7 +430,8 @@ def load_commit_history(self) -> None:
             nixpkgs_remote_name = find_nixpkgs_remote_name(self._repo)
             if nixpkgs_remote_name is None:
                 error = GLib.Error(
-                    f"Could not find a Git remote with URL “{NIXPKGS_REMOTE_URL}”.",
+                    _("Could not find a Git remote with URL “%(remote_url)s”.")
+                    % {"remote_url": NIXPKGS_REMOTE_URL},
                     "nonemast",
                     1,
                 )