diff --git a/data/locale/en-US.ini b/data/locale/en-US.ini
index ff02301..bd830ea 100644
--- a/data/locale/en-US.ini
+++ b/data/locale/en-US.ini
@@ -46,6 +46,8 @@ KeyFrames="Key Frames"
 KeyFrames.IntervalType="Interval Type"
 KeyFrames.IntervalType.Frames="Frames"
 KeyFrames.IntervalType.Seconds="Seconds"
+KeyFrames.IntervalType.Description="Keyframe interval type"
+KeyFrames.Interval.Description="Distance between key frames, in frames or seconds."
 KeyFrames.Interval="Interval"
 
 # Codec: H264
@@ -55,7 +57,9 @@ Codec.H264.Profile.baseline="Baseline"
 Codec.H264.Profile.main="Main"
 Codec.H264.Profile.high="High"
 Codec.H264.Profile.high444p="High 4:4:4 Predictive"
+Codec.H264.Profile.Description="H.264 profile determines which features of the codec can be used.\nHigh 4:4:4 Predictive is required for YUV 4:4:4 color space."
 Codec.H264.Level="Level"
+Codec.H264.Level.Description="Level determines the upper limits of resolution, frame rate and bitrate for the video."
 
 # Codec: HEVC
 Codec.HEVC="HEVC"
@@ -67,6 +71,7 @@ Codec.HEVC.Tier="Tier"
 Codec.HEVC.Tier.main="Main"
 Codec.HEVC.Tier.high="High"
 Codec.HEVC.Level="Level"
+Codec.HEVC.Level.Description="Level determines the upper limits of resolution, frame rate and bitrate for the video."
 
 # Codec: Apple ProRes
 Codec.ProRes.Profile="Profile"
@@ -79,6 +84,7 @@ Codec.ProRes.Profile.AP4X="4444 Extra Quality/XQ (AP4X)"
 
 # NVENC
 NVENC.Preset="Preset"
+NVENC.Preset.Description="Presets are NVIDIA's preconfigured default settings."
 NVENC.Preset.Default="Default"
 NVENC.Preset.Slow="Slow"
 NVENC.Preset.Medium="Medium"
@@ -93,12 +99,19 @@ NVENC.Preset.Lossless="Lossless"
 NVENC.Preset.LosslessHighPerformance="Lossless High Performance"
 NVENC.RateControl="Rate Control Options"
 NVENC.RateControl.Mode="Mode"
+NVENC.RateControl.Mode.Description="Rate control mode selection"
 NVENC.RateControl.Mode.CQP="Constant Quantization Parameter"
+NVENC.RateControl.Mode.CQP.Description="A flat compression ratio with no regard for bit rates."
 NVENC.RateControl.Mode.VBR="Variable Bitrate"
+NVENC.RateControl.Mode.VBR.Description="Sacrifices quality to stay below the upper bitrate limit,\nor saves bitrate where possible."
 NVENC.RateControl.Mode.VBR_HQ="High Quality Variable Bitrate"
+NVENC.RateControl.Mode.VBR_HQ.Description="Variable Bitrate with two-pass encoding enabled by default."
 NVENC.RateControl.Mode.CBR="Constant Bitrate"
+NVENC.RateControl.Mode.CBR.Description="Compresses footage so that it matches the target bitrate over the duration of\none second. This comes at a cost in quality during high motion scenes or\nscenes with flickering brightness like often seen in RPGs."
 NVENC.RateControl.Mode.CBR_HQ="High Quality Constant Bitrate"
+NVENC.RateControl.Mode.CBR_HQ.Description="Constant Bitrate with two-pass encoding enabled by default."
 NVENC.RateControl.Mode.CBR_LD_HQ="Low Delay High Quality Constant Bitrate"
+NVENC.RateControl.Mode.CBR_LD_HQ.Description="Constant Bitrate optimized for lowest encoding latency."
 NVENC.RateControl.LookAhead="Look Ahead"
 NVENC.RateControl.LookAhead.Description="Look ahead this many frames while encoding to better distribute bitrate.\nImproves quality slightly at the cost of some GPU time.\nSet to 0 to disable."
 NVENC.RateControl.AdaptiveI="Enable adaptive I-Frame insertion"
@@ -139,7 +152,7 @@ NVENC.AQ.Temporal="Enable Temporal Adaptive Quantization"
 NVENC.AQ.Temporal.Description="Enable temporal adaptive quantization."
 NVENC.Other="Other Options"
 NVENC.Other.BFrames="Maximum B-Frames"
-NVENC.Other.BFrames.Description="Maximum number of B-Frames to insert into the encoded bitstream.\nActual number of B-Frames may be lower depending on content and lookahead settings."
+NVENC.Other.BFrames.Description="Maximum number of B-Frames to insert into the encoded bitstream.\nActual number of B-Frames may be lower depending on content and lookahead settings.\nOnly Turing NVENC supports B-Frames for HEVC."
 NVENC.Other.BFrameReferenceMode="B-Frame Reference Mode"
 NVENC.Other.BFrameReferenceMode.Each="Each B-Frame will be used for references"
 NVENC.Other.BFrameReferenceMode.Middle="Only (# of B-Frames)/2 will be used for references"