diff --git a/superset-frontend/src/datasource/DatasourceModal.tsx b/superset-frontend/src/datasource/DatasourceModal.tsx
index 2ccb8fe1cc9..2dc1ceed025 100644
--- a/superset-frontend/src/datasource/DatasourceModal.tsx
+++ b/superset-frontend/src/datasource/DatasourceModal.tsx
@@ -190,7 +190,7 @@ const DatasourceModal: FunctionComponent<DatasourceModalProps> = ({
                   currentDatasource.edit_url || currentDatasource.url;
               }}
             >
-              {t('Use Legacy Datasource Editor')}
+              {t('Use legacy datasource editor')}
             </Button>
           )}
           <Button
diff --git a/superset-frontend/src/explore/components/ExploreViewContainer.jsx b/superset-frontend/src/explore/components/ExploreViewContainer.jsx
index 1a701df8e18..349bded05c6 100644
--- a/superset-frontend/src/explore/components/ExploreViewContainer.jsx
+++ b/superset-frontend/src/explore/components/ExploreViewContainer.jsx
@@ -443,7 +443,7 @@ function ExploreViewContainer(props) {
           tabIndex={0}
         >
           <span role="button" tabIndex={0} className="action-button">
-            <Tooltip title={t('Open Datasource Tab')}>
+            <Tooltip title={t('Open Datasource tab')}>
               <Icon
                 name="collapse"
                 color={supersetTheme.colors.primary.base}
diff --git a/superset-frontend/src/explore/components/PropertiesModal.tsx b/superset-frontend/src/explore/components/PropertiesModal.tsx
index cdbea9f76b4..1f0de038c34 100644
--- a/superset-frontend/src/explore/components/PropertiesModal.tsx
+++ b/superset-frontend/src/explore/components/PropertiesModal.tsx
@@ -194,7 +194,7 @@ export default function PropertiesModal({
       <form onSubmit={onSubmit}>
         <Row>
           <Col md={6}>
-            <h3>{t('Basic Information')}</h3>
+            <h3>{t('Basic information')}</h3>
             <FormGroup>
               <FormLabel htmlFor="name" required>
                 {t('Name')}
@@ -235,7 +235,7 @@ export default function PropertiesModal({
           <Col md={6}>
             <h3>{t('Configuration')}</h3>
             <FormGroup>
-              <FormLabel htmlFor="cacheTimeout">{t('Cache Timeout')}</FormLabel>
+              <FormLabel htmlFor="cacheTimeout">{t('Cache timeout')}</FormLabel>
               <FormControl
                 name="cacheTimeout"
                 type="text"
diff --git a/superset-frontend/src/explore/components/SaveModal.tsx b/superset-frontend/src/explore/components/SaveModal.tsx
index e079b1a2b00..c4e42e43f9d 100644
--- a/superset-frontend/src/explore/components/SaveModal.tsx
+++ b/superset-frontend/src/explore/components/SaveModal.tsx
@@ -162,7 +162,7 @@ class SaveModal extends React.Component<SaveModalProps, SaveModalState> {
       <StyledModal
         show
         onHide={this.props.onHide}
-        title={t('Save Chart')}
+        title={t('Save chart')}
         footer={
           <div data-test="save-modal-footer">
             <Button id="btn_cancel" buttonSize="sm" onClick={this.props.onHide}>
diff --git a/superset-frontend/src/explore/components/controls/AnnotationLayer.jsx b/superset-frontend/src/explore/components/controls/AnnotationLayer.jsx
index 1c65c56e7c5..10e95027874 100644
--- a/superset-frontend/src/explore/components/controls/AnnotationLayer.jsx
+++ b/superset-frontend/src/explore/components/controls/AnnotationLayer.jsx
@@ -377,7 +377,7 @@ export default class AnnotationLayer extends React.PureComponent {
     let description = '';
     if (requiresQuery(sourceType)) {
       if (sourceType === ANNOTATION_SOURCE_TYPES.NATIVE) {
-        label = 'Annotation Layer';
+        label = 'Annotation layer';
         description = 'Select the Annotation Layer you would like to use.';
       } else {
         label = t('Chart');
@@ -467,8 +467,8 @@ export default class AnnotationLayer extends React.PureComponent {
                 name="annotation-layer-time-column"
                 label={
                   annotationType === ANNOTATION_TYPES.INTERVAL
-                    ? 'Interval Start column'
-                    : 'Event Time Column'
+                    ? 'Interval start column'
+                    : 'Event time column'
                 }
                 description="This column must contain date/time information."
                 validationErrors={!timeColumn ? ['Mandatory'] : []}
@@ -608,7 +608,7 @@ export default class AnnotationLayer extends React.PureComponent {
           options={[
             { value: 'solid', label: 'Solid' },
             { value: 'dashed', label: 'Dashed' },
-            { value: 'longDashed', label: 'Long Dashed' },
+            { value: 'longDashed', label: 'Long dashed' },
             { value: 'dotted', label: 'Dotted' },
           ]}
           value={style}
@@ -648,7 +648,7 @@ export default class AnnotationLayer extends React.PureComponent {
         </div>
         <TextControl
           name="annotation-layer-stroke-width"
-          label={t('Line Width')}
+          label={t('Line width')}
           isInt
           value={width}
           onChange={v => this.setState({ width: v })}
@@ -711,14 +711,14 @@ export default class AnnotationLayer extends React.PureComponent {
               />
               <CheckboxControl
                 name="annotation-layer-hide"
-                label={t('Hide Layer')}
+                label={t('Hide layer')}
                 value={!show}
                 onChange={v => this.setState({ show: !v })}
               />
               <SelectControl
                 hovered
-                description={t('Choose the Annotation Layer Type')}
-                label={t('Annotation Layer Type')}
+                description={t('Choose the annotation layer type')}
+                label={t('Annotation layer type')}
                 name="annotation-layer-type"
                 clearable={false}
                 options={supportedAnnotationTypes}
diff --git a/superset-frontend/src/explore/components/controls/AnnotationLayerControl.jsx b/superset-frontend/src/explore/components/controls/AnnotationLayerControl.jsx
index e47388c3470..a701892e50d 100644
--- a/superset-frontend/src/explore/components/controls/AnnotationLayerControl.jsx
+++ b/superset-frontend/src/explore/components/controls/AnnotationLayerControl.jsx
@@ -163,7 +163,7 @@ class AnnotationLayerControl extends React.PureComponent {
         key={i}
         trigger="click"
         placement="right"
-        title={t('Edit Annotation Layer')}
+        title={t('Edit annotation layer')}
         content={this.renderPopover(
           i,
           anno,
diff --git a/superset-frontend/src/explore/components/controls/DatasourceControl.jsx b/superset-frontend/src/explore/components/controls/DatasourceControl.jsx
index e30aebe8763..d531d55c45b 100644
--- a/superset-frontend/src/explore/components/controls/DatasourceControl.jsx
+++ b/superset-frontend/src/explore/components/controls/DatasourceControl.jsx
@@ -156,10 +156,10 @@ class DatasourceControl extends React.PureComponent {
       <Menu onClick={this.handleMenuItemClick}>
         {this.props.isEditable && (
           <Menu.Item key={EDIT_DATASET} data-test="edit-dataset">
-            {t('Edit Dataset')}
+            {t('Edit dataset')}
           </Menu.Item>
         )}
-        <Menu.Item key={CHANGE_DATASET}>{t('Change Dataset')}</Menu.Item>
+        <Menu.Item key={CHANGE_DATASET}>{t('Change dataset')}</Menu.Item>
         <Menu.Item key={VIEW_IN_SQL_LAB}>{t('View in SQL Lab')}</Menu.Item>
       </Menu>
     );
diff --git a/superset-frontend/src/explore/components/controls/FilterControl/AdhocFilterEditPopoverSimpleTabContent.jsx b/superset-frontend/src/explore/components/controls/FilterControl/AdhocFilterEditPopoverSimpleTabContent.jsx
index dbec5e67e58..9940d06991e 100644
--- a/superset-frontend/src/explore/components/controls/FilterControl/AdhocFilterEditPopoverSimpleTabContent.jsx
+++ b/superset-frontend/src/explore/components/controls/FilterControl/AdhocFilterEditPopoverSimpleTabContent.jsx
@@ -323,7 +323,7 @@ export default class AdhocFilterEditPopoverSimpleTabContent extends React.Compon
       loading: this.state.loading,
       value: comparator,
       onChange: this.onComparatorChange,
-      notFoundContent: t('type a value here'),
+      notFoundContent: t('Type a value here'),
       disabled: DISABLE_INPUT_OPERATORS.includes(operator),
       placeholder: this.createSuggestionsPlaceholder(),
       labelText: comparator?.length > 0 && this.createSuggestionsPlaceholder(),
diff --git a/superset-frontend/src/explore/components/controls/FilterControl/AdhocFilterEditPopoverSqlTabContent.jsx b/superset-frontend/src/explore/components/controls/FilterControl/AdhocFilterEditPopoverSqlTabContent.jsx
index 7841d889096..429414be746 100644
--- a/superset-frontend/src/explore/components/controls/FilterControl/AdhocFilterEditPopoverSqlTabContent.jsx
+++ b/superset-frontend/src/explore/components/controls/FilterControl/AdhocFilterEditPopoverSqlTabContent.jsx
@@ -124,9 +124,9 @@ export default class AdhocFilterEditPopoverSqlTabContent extends React.Component
             ))}
           </Select>
           <span className="filter-edit-clause-info">
-            <strong>WHERE</strong> {t('filters by columns')}
+            <strong>WHERE</strong> {t('Filters by columns')}
             <br />
-            <strong>HAVING</strong> {t('filters by metrics')}
+            <strong>HAVING</strong> {t('Filters by metrics')}
           </span>
         </FormGroup>
         <FormGroup>
diff --git a/superset-frontend/src/explore/components/controls/MetricControl/AdhocMetricEditPopoverTitle.jsx b/superset-frontend/src/explore/components/controls/MetricControl/AdhocMetricEditPopoverTitle.jsx
index 4c2f3f46610..d5ac3178b02 100644
--- a/superset-frontend/src/explore/components/controls/MetricControl/AdhocMetricEditPopoverTitle.jsx
+++ b/superset-frontend/src/explore/components/controls/MetricControl/AdhocMetricEditPopoverTitle.jsx
@@ -70,7 +70,7 @@ export default class AdhocMetricEditPopoverTitle extends React.Component {
 
   render() {
     const { title, onChange, isEditDisabled } = this.props;
-    const defaultLabel = t('My Metric');
+    const defaultLabel = t('My metric');
 
     if (isEditDisabled) {
       return (