diff --git a/src/timelines/ChooseTootLang.tsx b/src/timelines/ChooseTootLang.tsx
new file mode 100644
index 0000000..8405bb1
--- /dev/null
+++ b/src/timelines/ChooseTootLang.tsx
@@ -0,0 +1,86 @@
+import {
+  For,
+  onMount,
+  type Component,
+  type JSX,
+} from "solid-js";
+import Scaffold from "../material/Scaffold";
+import {
+  AppBar,
+  IconButton,
+  List,
+  ListItemButton,
+  ListItemSecondaryAction,
+  ListItemText,
+  Radio,
+  Toolbar,
+} from "@suid/material";
+import { Close as CloseIcon } from "@suid/icons-material";
+import iso639_1 from "iso-639-1";
+import { createTranslator } from "../platform/i18n";
+import { Title } from "../material/typography";
+
+type ChooseTootLangProps = {
+  code: string;
+  onCodeChange: (ncode?: string) => void;
+  onClose?: JSX.EventHandlerUnion<HTMLButtonElement, MouseEvent>;
+};
+
+const ChooseTootLang: Component<ChooseTootLangProps> = (props) => {
+  let listRef: HTMLUListElement;
+  const [t] = createTranslator(
+    (code) =>
+      import(`./i18n/${code}.json`) as Promise<{
+        default: Record<string, string | undefined>;
+      }>,
+  );
+
+  onMount(() => {
+    const code = props.code;
+    const el = listRef.querySelector(`[data-langcode="${code}"]`);
+    if (el) {
+      el.scrollIntoView({ behavior: "auto" });
+    }
+  });
+
+  return (
+    <Scaffold
+      topbar={
+        <AppBar position="static">
+          <Toolbar
+            variant="dense"
+            sx={{ paddingTop: "var(--safe-area-inset-top, 0px)" }}
+          >
+            <IconButton color="inherit" onClick={props.onClose} disableRipple>
+              <CloseIcon />
+            </IconButton>
+            <Title>{t("Choose Language")}</Title>
+          </Toolbar>
+        </AppBar>
+      }
+    >
+      <List
+        ref={listRef!}
+        sx={{
+          paddingBottom: "var(--safe-area-inset-bottom, 0)",
+        }}
+      >
+        <For each={iso639_1.getAllCodes()}>
+          {(code) => (
+            <ListItemButton
+              data-langcode={code}
+              onClick={() => props.onCodeChange(code)}
+            >
+              <ListItemText>{iso639_1.getNativeName(code)}</ListItemText>
+              <ListItemSecondaryAction>
+                <Radio checked={props.code == code}></Radio>
+              </ListItemSecondaryAction>
+            </ListItemButton>
+          )}
+        </For>
+      </List>
+    </Scaffold>
+  );
+};
+
+export default ChooseTootLang;
diff --git a/src/timelines/ReplyEditor.tsx b/src/timelines/ReplyEditor.tsx
index 0f146c4..51259b9 100644
--- a/src/timelines/ReplyEditor.tsx
+++ b/src/timelines/ReplyEditor.tsx
@@ -27,11 +27,16 @@ import {
   People as PeopleIcon,
   ThreeP as ThreePIcon,
   ListAlt as ListAltIcon,
+  Visibility,
+  Translate,
 } from "@suid/icons-material";
 import type { Account } from "../accounts/stores";
 import tootComposers from "./TootComposer.module.css";
 import { makeEventListener } from "@solid-primitives/event-listener";
 import BottomSheet from "../material/BottomSheet";
+import { useLanguage } from "../platform/i18n";
+import iso639_1 from "iso-639-1";
+import ChooseTootLang from "./ChooseTootLang";
 
 type TootVisibility = "public" | "unlisted" | "private" | "direct";
 
@@ -154,17 +159,19 @@ const TootVisibilityPickerDialog: Component<{
 const ReplyEditor: Component<{
   profile: Account;
   replyToDisplayName: string;
-  isTyping?: boolean
-  onTypingChange: (value: boolean) => void
+  isTyping?: boolean;
+  onTypingChange: (value: boolean) => void;
 }> = (props) => {
   let inputRef: HTMLTextAreaElement;
   const buttonId = createUniqueId();
   const menuId = createUniqueId();
 
-  const typing = () => props.isTyping
-  const setTyping = (v: boolean) => props.onTypingChange(v)
+  const typing = () => props.isTyping;
+  const setTyping = (v: boolean) => props.onTypingChange(v);
   const [visibility, setVisibility] = createSignal<TootVisibility>("public");
   const [permPicker, setPermPicker] = createSignal(false);
+  const [language, setLanguage] = createSignal(useLanguage()().split("-")[0]);
+  const [langPickerOpen, setLangPickerOpen] = createSignal(false);
 
   onMount(() => {
     makeEventListener(inputRef, "focus", () => setTyping(true));
@@ -218,7 +225,13 @@ const ReplyEditor: Component<{
           "margin-top": "8px",
         }}
       >
+        <Button onClick={[setLangPickerOpen, true]}>
+          <Translate sx={{ marginTop: "-0.25em", marginRight: "0.25em" }} />
+          {iso639_1.getNativeName(language())}
+          <ArrowDropDown sx={{ marginTop: "-0.25em" }} />
+        </Button>
         <Button onClick={[setPermPicker, true]} id={buttonId}>
+          <Visibility sx={{ marginTop: "-0.15em", marginRight: "0.25em" }} />
           {visibilityText()}
           <ArrowDropDown sx={{ marginTop: "-0.25em" }} />
         </Button>
@@ -230,6 +243,17 @@ const ReplyEditor: Component<{
         visibility={visibility()}
         onVisibilityChange={setVisibility}
       />
+
+      <BottomSheet
+        open={langPickerOpen()}
+        onClose={() => setLangPickerOpen(false)}
+      >
+        <ChooseTootLang
+          code={language()}
+          onCodeChange={setLanguage}
+          onClose={[setLangPickerOpen, false]}
+        />
+      </BottomSheet>
     </div>
   );
 };
diff --git a/src/timelines/i18n/en.json b/src/timelines/i18n/en.json
new file mode 100644
index 0000000..f9bed6a
--- /dev/null
+++ b/src/timelines/i18n/en.json
@@ -0,0 +1,3 @@
+{
+  "Choose Language": "Choose Language"
+}
\ No newline at end of file
diff --git a/src/timelines/i18n/zh-Hans.json b/src/timelines/i18n/zh-Hans.json
new file mode 100644
index 0000000..06d6bfb
--- /dev/null
+++ b/src/timelines/i18n/zh-Hans.json
@@ -0,0 +1,3 @@
+{
+  "Choose Language": "选择语言"
+}
\ No newline at end of file