diff --git a/python/core/symbology/qgssinglesymbolrenderer.sip b/python/core/symbology/qgssinglesymbolrenderer.sip
index 940cc057eb0..622bfbb576d 100644
--- a/python/core/symbology/qgssinglesymbolrenderer.sip
+++ b/python/core/symbology/qgssinglesymbolrenderer.sip
@@ -63,7 +63,7 @@ create renderer from XML element
     void setDataDefinedSizeLegend( QgsDataDefinedSizeLegend *settings /Transfer/ );
 %Docstring
  Configures appearance of legend when renderer is configured to use data-defined size for marker symbols.
- This allow to configure for which values (symbol sizes) should be shown in the legend, whether to display
+ This allows configuring which values (symbol sizes) should be shown in the legend, whether to display
  different symbol sizes collapsed in one legend node or separated across multiple legend nodes etc.
 
  When renderer does not use data-defined size or does not use marker symbols, these settings will be ignored.
diff --git a/python/plugins/processing/core/parameters.py b/python/plugins/processing/core/parameters.py
index f6a2751f6b7..0321276bb2f 100644
--- a/python/plugins/processing/core/parameters.py
+++ b/python/plugins/processing/core/parameters.py
@@ -190,7 +190,7 @@ class ParameterMultipleInput(Parameter):
             return True
 
         if _minNumInputs < 1 and not self.flags() & QgsProcessingParameterDefinition.FlagOptional:
-            # don't allow to set negative or null number of inputs if parameter isn't optional
+            # don't allow setting negative or null number of inputs if parameter isn't optional
             return False
 
         self.minNumInputs = int(_minNumInputs)
diff --git a/src/core/symbology/qgssinglesymbolrenderer.h b/src/core/symbology/qgssinglesymbolrenderer.h
index f0ace755cc3..891a2da60bc 100644
--- a/src/core/symbology/qgssinglesymbolrenderer.h
+++ b/src/core/symbology/qgssinglesymbolrenderer.h
@@ -66,7 +66,7 @@ class CORE_EXPORT QgsSingleSymbolRenderer : public QgsFeatureRenderer
 
     /**
      * Configures appearance of legend when renderer is configured to use data-defined size for marker symbols.
-     * This allow to configure for which values (symbol sizes) should be shown in the legend, whether to display
+     * This allows configuring which values (symbol sizes) should be shown in the legend, whether to display
      * different symbol sizes collapsed in one legend node or separated across multiple legend nodes etc.
      *
      * When renderer does not use data-defined size or does not use marker symbols, these settings will be ignored.