diff --git a/backend/alembic/versions/2022_12_28_1824-ef0b52902560_added_lang_column_for_iso_639_1_codes.py b/backend/alembic/versions/2022_12_28_1824-ef0b52902560_added_lang_column_for_iso_639_1_codes.py
new file mode 100644
index 00000000..cb6ae5da
--- /dev/null
+++ b/backend/alembic/versions/2022_12_28_1824-ef0b52902560_added_lang_column_for_iso_639_1_codes.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+"""Added lang column for ISO-639-1 codes
+
+Revision ID: ef0b52902560
+Revises: 3358eb6834e6
+Create Date: 2022-12-28 18:24:21.393973
+
+"""
+import sqlalchemy as sa
+import sqlmodel
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "ef0b52902560"
+down_revision = "3358eb6834e6"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column(
+        "post", sa.Column("lang", sqlmodel.sql.sqltypes.AutoString(length=200), nullable=False, default="en-US")
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column("post", "lang")
+    # ### end Alembic commands ###
diff --git a/backend/oasst_backend/models/post.py b/backend/oasst_backend/models/post.py
index ffa52240..51fa067e 100644
--- a/backend/oasst_backend/models/post.py
+++ b/backend/oasst_backend/models/post.py
@@ -31,5 +31,6 @@ class Post(SQLModel, table=True):
     )
     payload_type: str = Field(nullable=False, max_length=200)
     payload: PayloadContainer = Field(sa_column=sa.Column(payload_column_type(PayloadContainer), nullable=True))
+    lang: str = Field(nullable=False, max_length=200, default="en-US")
     depth: int = Field(sa_column=sa.Column(sa.Integer, default=0, server_default=sa.text("0"), nullable=False))
     children_count: int = Field(sa_column=sa.Column(sa.Integer, default=0, server_default=sa.text("0"), nullable=False))