diff --git a/Cargo.lock b/Cargo.lock
index 0fa5c2f..bbafdf5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1490,7 +1490,7 @@ dependencies = [
 
 [[package]]
 name = "nsigner"
-version = "0.0.7"
+version = "0.0.8"
 dependencies = [
  "base64",
  "chacha20poly1305",
diff --git a/Cargo.toml b/Cargo.toml
index e379721..72f7e0e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "nsigner"
-version = "0.0.8"
+version = "0.0.9"
 edition = "2021"
 license = "MIT"
 description = "Attended Nostr signing daemon — Rust port of n_signer"
diff --git a/src/lib.rs b/src/lib.rs
index 9b3f366..3f644fc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -31,4 +31,4 @@ pub mod error;
 pub use error::NsignerError;
 
 /// Version string (matches C NSIGNER_VERSION).
-pub const VERSION: &str = "v0.0.8";
+pub const VERSION: &str = "v0.0.9";
diff --git a/src/tui.rs b/src/tui.rs
index 4b25d85..dc0c3bd 100644
--- a/src/tui.rs
+++ b/src/tui.rs
@@ -38,6 +38,11 @@ pub const TRANSPORT_HTTP: u8 = 0x08;
 /// Matches NSIGNER_QREXEC_SERVICE_NAME in n_signer/src/main.c.
 pub const QREXEC_SERVICE_NAME: &str = "qubes.NsignerRpc";
 
+/// Check if a word is in the BIP-39 English wordlist.
+fn is_valid_bip39_word(word: &str) -> bool {
+    nips::nip006::bip39_wordlist().binary_search(&word).is_ok()
+}
+
 /// Number of focusable commands on the main screen:
 /// 4 transports + Add + Edit + Delete + Clear + Help + Quit.
 pub const FOCUS_COUNT: usize = 10;
@@ -1293,6 +1298,50 @@ impl App {
                 Style::default(),
             )),
         ];
+
+        // Per-word validation: split the input by whitespace and check
+        // each completed word against the BIP-39 wordlist.  The word
+        // currently being typed (last fragment without a trailing space)
+        // is not checked — only space-separated completed words count.
+        let buffer = &self.unlock_input.buffer;
+        let has_trailing_space = buffer.ends_with(' ');
+        let words: Vec<&str> = buffer.split_whitespace().collect();
+        let completed_count = if has_trailing_space {
+            words.len()
+        } else {
+            words.len().saturating_sub(1)
+        };
+
+        if completed_count > 0 {
+            let red = Style::default().fg(ratatui::style::Color::Red);
+            let green = Style::default().fg(ratatui::style::Color::Green);
+            let mut spans: Vec<Span> = Vec::new();
+            for (i, w) in words.iter().take(completed_count).enumerate() {
+                if i > 0 {
+                    spans.push(Span::raw(" "));
+                }
+                if is_valid_bip39_word(w) {
+                    spans.push(Span::styled(format!("✓{}", w), green));
+                } else {
+                    spans.push(Span::styled(format!("✗{}", w), red));
+                }
+            }
+            lines.push(Line::from(""));
+            lines.push(Line::from(spans));
+        }
+
+        // Word count indicator.
+        let total_words = words.len();
+        if total_words > 0 {
+            let valid_counts = [12, 15, 18, 21, 24];
+            let count_note = if valid_counts.contains(&total_words) {
+                format!("Words: {} (valid count)", total_words)
+            } else {
+                format!("Words: {} (need 12/15/18/21/24)", total_words)
+            };
+            lines.push(Line::from(count_note));
+        }
+
         if self.seed_attempts > 0 {
             lines.push(Line::from(format!(
                 "Invalid mnemonic. Attempts: {}/10",