diff --git a/keyboard_layout/src/layout.rs b/keyboard_layout/src/layout.rs
index c63ebd8..7302301 100644
--- a/keyboard_layout/src/layout.rs
+++ b/keyboard_layout/src/layout.rs
@@ -453,6 +453,13 @@ impl Layout {
         (base, mods)
     }
 
+    /// If the layout has at least one layer configured as hold layer
+    pub fn has_hold_layers(&self) -> bool {
+        self.layerkeys
+            .iter()
+            .any(|lk| std::matches!(lk.modifiers, LayerModifiers::Hold(_)))
+    }
+
     /// If the layout has at least one layer configured as one-shot layer
     pub fn has_one_shot_layers(&self) -> bool {
         self.layerkeys
diff --git a/layout_evaluation/src/ngram_mapper/bigram_mapper.rs b/layout_evaluation/src/ngram_mapper/bigram_mapper.rs
index 2dc16b2..5f65b0d 100644
--- a/layout_evaluation/src/ngram_mapper/bigram_mapper.rs
+++ b/layout_evaluation/src/ngram_mapper/bigram_mapper.rs
@@ -83,11 +83,11 @@ impl OnDemandBigramMapper {
             map_bigrams(bigrams, layout, exclude_line_breaks);
 
         if layout.has_one_shot_layers() {
-            bigram_keys_vec = self.process_one_shot_layers(bigram_keys_vec, layout);
+            bigram_keys_vec = self.process_one_shot_modifiers(bigram_keys_vec, layout);
         }
 
-        let bigram_keys = if self.split_modifiers.enabled {
-            self.split_bigram_modifiers(bigram_keys_vec, layout)
+        let bigram_keys = if self.split_modifiers.enabled && layout.has_hold_layers() {
+            self.process_hold_modifiers(bigram_keys_vec, layout)
         } else {
             bigram_keys_vec.into_iter().collect()
         };
@@ -135,7 +135,7 @@ impl OnDemandBigramMapper {
     ///
     /// Each bigram of higher-layer symbols will transform into a series of bigrams with permutations of
     /// the involved base-keys and modifers. However, the base-key will always be after its modifier.
-    fn split_bigram_modifiers(&self, bigrams: BigramIndicesVec, layout: &Layout) -> BigramIndices {
+    fn process_hold_modifiers(&self, bigrams: BigramIndicesVec, layout: &Layout) -> BigramIndices {
         let mut bigram_w_map = AHashMap::with_capacity(bigrams.len() / 3);
 
         bigrams.into_iter().for_each(|((k1, k2), w)| {
@@ -190,7 +190,7 @@ impl OnDemandBigramMapper {
         bigram_w_map
     }
 
-    fn process_one_shot_layers(
+    fn process_one_shot_modifiers(
         &self,
         bigrams: BigramIndicesVec,
         layout: &Layout,
diff --git a/layout_evaluation/src/ngram_mapper/trigram_mapper.rs b/layout_evaluation/src/ngram_mapper/trigram_mapper.rs
index 41ccc2e..6dfd47d 100644
--- a/layout_evaluation/src/ngram_mapper/trigram_mapper.rs
+++ b/layout_evaluation/src/ngram_mapper/trigram_mapper.rs
@@ -90,11 +90,11 @@ impl OnDemandTrigramMapper {
             map_trigrams(trigrams, layout, exclude_line_breaks);
 
         if layout.has_one_shot_layers() {
-            trigram_keys_vec = self.process_one_shot_layers(trigram_keys_vec, layout);
+            trigram_keys_vec = self.process_one_shot_modifiers(trigram_keys_vec, layout);
         }
 
-        let trigram_keys = if self.split_modifiers.enabled {
-            self.split_trigram_modifiers(trigram_keys_vec, layout)
+        let trigram_keys = if self.split_modifiers.enabled && layout.has_hold_layers() {
+            self.process_hold_modifiers(trigram_keys_vec, layout)
         } else {
             trigram_keys_vec.into_iter().collect()
         };
@@ -140,7 +140,7 @@ impl OnDemandTrigramMapper {
     /// trigram can be large (tens of trigrams) if multiple symbols of the trigram are accessed using multiple modifiers.
 
     // this is one of the most intensive functions of the layout evaluation
-    fn split_trigram_modifiers(
+    fn process_hold_modifiers(
         &self,
         trigrams: TrigramIndicesVec,
         layout: &Layout,
@@ -276,7 +276,7 @@ impl OnDemandTrigramMapper {
         trigram_w_map
     }
 
-    fn process_one_shot_layers(
+    fn process_one_shot_modifiers(
         &self,
         trigrams: TrigramIndicesVec,
         layout: &Layout,
diff --git a/layout_evaluation/src/ngram_mapper/unigram_mapper.rs b/layout_evaluation/src/ngram_mapper/unigram_mapper.rs
index 7877186..eed6b2b 100644
--- a/layout_evaluation/src/ngram_mapper/unigram_mapper.rs
+++ b/layout_evaluation/src/ngram_mapper/unigram_mapper.rs
@@ -57,11 +57,11 @@ impl OnDemandUnigramMapper {
         let (mut unigram_keys_vec, not_found_weight) = map_unigrams(unigrams, layout);
 
         if layout.has_one_shot_layers() {
-            unigram_keys_vec = self.process_one_shot_layers(unigram_keys_vec, layout);
+            unigram_keys_vec = self.process_one_shot_modifiers(unigram_keys_vec, layout);
         }
 
-        let unigram_keys = if self.split_modifiers.enabled {
-            Self::split_unigram_modifiers(unigram_keys_vec, layout)
+        let unigram_keys = if self.split_modifiers.enabled && layout.has_hold_layers() {
+            Self::process_hold_modifiers(unigram_keys_vec, layout)
         } else {
             unigram_keys_vec.into_iter().collect()
         };
@@ -85,7 +85,7 @@ impl OnDemandUnigramMapper {
     ///
     /// Each unigram of a higher-layer symbol will transform into a unigram with the base-layer key and one
     /// for each modifier involved in accessing the higher layer.
-    fn split_unigram_modifiers(unigrams: UnigramIndicesVec, layout: &Layout) -> UnigramIndices {
+    fn process_hold_modifiers(unigrams: UnigramIndicesVec, layout: &Layout) -> UnigramIndices {
         let mut idx_w_map = AHashMap::with_capacity(unigrams.len() / 3);
         unigrams.into_iter().for_each(|(k, w)| {
             let (base, mods) = layout.resolve_modifiers(&k);
@@ -117,7 +117,7 @@ impl OnDemandUnigramMapper {
         idx_w_map
     }
 
-    fn process_one_shot_layers(
+    fn process_one_shot_modifiers(
         &self,
         unigrams: UnigramIndicesVec,
         layout: &Layout,