diff --git a/alembic/versions/0022_localization.py b/alembic/versions/0022_localization.py
new file mode 100644
index 0000000..30f6814
--- /dev/null
+++ b/alembic/versions/0022_localization.py
@@ -0,0 +1,46 @@
+"""localization: users.lang + strategic_log_translations.
+
+Revision ID: 0022
+Revises: 0021
+Create Date: 2026-05-27
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+
+revision: str = "0022"
+down_revision: Union[str, None] = "0021"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "users",
+        sa.Column(
+            "lang", sa.String(length=8), nullable=False,
+            server_default="en",
+        ),
+    )
+    op.create_table(
+        "strategic_log_translations",
+        sa.Column("id", sa.BigInteger(), primary_key=True, autoincrement=True),
+        sa.Column("log_id", sa.BigInteger(), nullable=False),
+        sa.Column("lang", sa.String(length=8), nullable=False),
+        sa.Column("content_md", sa.Text(), nullable=False),
+        sa.Column("generated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("llm_model", sa.String(length=64), nullable=True),
+        sa.Column("llm_cost_usd", sa.Float(), nullable=True),
+        sa.ForeignKeyConstraint(
+            ["log_id"], ["strategic_logs.id"],
+            ondelete="CASCADE", name="fk_slt_log",
+        ),
+        sa.UniqueConstraint("log_id", "lang", name="uq_slt_log_lang"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("strategic_log_translations")
+    op.drop_column("users", "lang")