diff --git a/src/base/photoflow_run_batch.cc b/src/base/photoflow_run_batch.cc
index b18426127..c90a2ad6d 100644
--- a/src/base/photoflow_run_batch.cc
+++ b/src/base/photoflow_run_batch.cc
@@ -412,12 +412,12 @@ int PF::PhotoFlow::run_batch(int argc, char *argv[])
     std::cout<<"bname="<<bname<<std::endl;
     std::string ext;
     if( !PF::getFileExtension( "", bname, ext ) ) {
-      std::cout<<"PhotoFlow::run_batch(): Cannot detemine input file extension. Exiting."<<std::endl;
+      std::cout<<"PhotoFlow::run_batch(): Cannot determine input file extension. Exiting."<<std::endl;
       return 1;
     }
     std::string iname;
     if( !PF::getFileName( "", bname, iname ) ) {
-      std::cout<<"PhotoFlow::run_batch(): Cannot detemine input file name. Exiting."<<std::endl;
+      std::cout<<"PhotoFlow::run_batch(): Cannot determine input file name. Exiting."<<std::endl;
       return 1;
     }
     std::cout<<"iname="<<iname<<std::endl;
@@ -455,7 +455,7 @@ int PF::PhotoFlow::run_batch(int argc, char *argv[])
 
     std::string oext;
     if( !PF::getFileExtension( "", img_out, oext ) ) {
-      std::cout<<"Cannot detemine output file extension. Exiting."<<std::endl;
+      std::cout<<"Cannot determine output file extension. Exiting."<<std::endl;
       return 1;
     }
     if( oext == "pfi") {
diff --git a/src/external/rawspeed/src/librawspeed/tiff/TiffIFD.h b/src/external/rawspeed/src/librawspeed/tiff/TiffIFD.h
index 299bc7713..0765d1af9 100644
--- a/src/external/rawspeed/src/librawspeed/tiff/TiffIFD.h
+++ b/src/external/rawspeed/src/librawspeed/tiff/TiffIFD.h
@@ -147,7 +147,7 @@ inline Endianness getTiffByteOrder(const ByteStream& bs, uint32 pos,
   if (bs.hasPatternAt("MM", 2, pos))
     return Endianness::big;
 
-  ThrowTPE("Failed to parse TIFF endianess information in %s.", context);
+  ThrowTPE("Failed to parse TIFF endianness information in %s.", context);
 }
 
 } // namespace rawspeed
diff --git a/src/operations/clahe.cc b/src/operations/clahe.cc
index d31e39c29..bf588f844 100644
--- a/src/operations/clahe.cc
+++ b/src/operations/clahe.cc
@@ -69,7 +69,7 @@ VipsImage* PF::CLAHEPar::build(std::vector<VipsImage*>& in, int first,
 
 
   if( vips_hist_local( ucharimg, &claheimg, width.get(), width.get(), "max_slope", slope.get(), NULL ) ) {
-    std::cout<<"WARNIG: CLAHEPar::build(): vips_hist_local() failed."<<std::endl;
+    std::cout<<"WARNING: CLAHEPar::build(): vips_hist_local() failed."<<std::endl;
     return NULL;
   }
 
diff --git a/src/operations/crop.cc b/src/operations/crop.cc
index f4cc1346e..51a3031ae 100644
--- a/src/operations/crop.cc
+++ b/src/operations/crop.cc
@@ -100,7 +100,7 @@ VipsImage* PF::CropPar::build(std::vector<VipsImage*>& in, int first,
   if( (ctop+ch) > srcimg->Ysize ) ch = srcimg->Ysize - ctop;
 
   if( vips_crop( srcimg, &out, cleft, ctop, cw, ch, NULL ) ) {
-    std::cout<<"WARNIG: CropPar::build(): vips_crop() failed."<<std::endl;
+    std::cout<<"WARNING: CropPar::build(): vips_crop() failed."<<std::endl;
     std::cout<<"srcimg->Xsize="<<srcimg->Xsize<<"  srcimg->Ysize="<<srcimg->Ysize<<std::endl;
     std::cout<<"vips_crop( srcimg, &out, "<<crop_left.get()/scale_factor<<", "<<crop_top.get()/scale_factor<<", "
         <<crop_width.get()/scale_factor<<", "<<crop_height.get()/scale_factor<<", NULL )"<<std::endl;
diff --git a/src/operations/lensfun.cc b/src/operations/lensfun.cc
index 2d7c36790..699698125 100644
--- a/src/operations/lensfun.cc
+++ b/src/operations/lensfun.cc
@@ -352,7 +352,7 @@ VipsImage* PF::LensFunParStep::build(std::vector<VipsImage*>& in, int first,
         int ctop = (outnew->Ysize - ch)/2;
         VipsImage* timg = NULL;
         if( vips_crop( outnew, &timg, cleft, ctop, cw, ch, NULL ) ) {
-          std::cout<<"WARNIG: LensFunPar::build(): vips_crop() failed."<<std::endl;
+          std::cout<<"WARNING: LensFunPar::build(): vips_crop() failed."<<std::endl;
           std::cout<<"outnew->Xsize="<<outnew->Xsize<<"  outnew->Ysize="<<outnew->Ysize<<std::endl;
           std::cout<<"vips_crop( outnew, &timg, "<<cleft<<", "<<ctop<<", "
               <<cw<<", "<<ch<<", NULL )"<<std::endl;
diff --git a/src/operations/scale.cc b/src/operations/scale.cc
index d12ae8723..8833be85c 100644
--- a/src/operations/scale.cc
+++ b/src/operations/scale.cc
@@ -325,7 +325,7 @@ VipsImage* PF::ScalePar::build(std::vector<VipsImage*>& in, int first,
       std::cout<<"rotation: out_width="<<out_width<<" dw1="<<dw1<<" dw2="<<dw2<<" dw="<<dw<<std::endl;
       //std::cout<<"rotation: width="<<srcimg->Xsize<<"->"<<cropped_width<<"  height="<<srcimg->Ysize<<"->"<<cropped_height<<std::endl;
       if( vips_crop( srcimg, &out, dw, dh, out_width-2*dw, out_height-2*dh, NULL ) ) {
-        std::cout<<"WARNIG: ScalePar::build(): vips_crop() failed."<<std::endl;
+        std::cout<<"WARNING: ScalePar::build(): vips_crop() failed."<<std::endl;
         //std::cout<<"srcimg->Xsize="<<srcimg->Xsize<<"  srcimg->Ysize="<<srcimg->Ysize<<std::endl;
         //std::cout<<"vips_crop( srcimg, &out, "<<crop_left.get()/scale_factor<<", "<<crop_top.get()/scale_factor<<", "
         //    <<crop_width.get()/scale_factor<<", "<<crop_height.get()/scale_factor<<", NULL )"<<std::endl;
@@ -337,7 +337,7 @@ VipsImage* PF::ScalePar::build(std::vector<VipsImage*>& in, int first,
       int dw = rotated->Xsize - roi_out.width;
       int dh = rotated->Ysize - roi_out.height;
       if( vips_crop( rotated, &out, dw/2, dh/2, roi_out.width, roi_out.height, NULL ) ) {
-        std::cout<<"WARNIG: ScalePar::build(): vips_crop() failed."<<std::endl;
+        std::cout<<"WARNING: ScalePar::build(): vips_crop() failed."<<std::endl;
         //std::cout<<"srcimg->Xsize="<<srcimg->Xsize<<"  srcimg->Ysize="<<srcimg->Ysize<<std::endl;
         //std::cout<<"vips_crop( srcimg, &out, "<<crop_left.get()/scale_factor<<", "<<crop_top.get()/scale_factor<<", "
         //    <<crop_width.get()/scale_factor<<", "<<crop_height.get()/scale_factor<<", NULL )"<<std::endl;
diff --git a/src/pfbatch.cc b/src/pfbatch.cc
index 1cab2f593..a776cbf62 100644
--- a/src/pfbatch.cc
+++ b/src/pfbatch.cc
@@ -201,12 +201,12 @@ int main (int argc, char *argv[])
     std::cout<<"bname="<<bname<<std::endl;
     std::string ext;
     if( !PF::getFileExtension( "", bname, ext ) ) {
-      std::cout<<"Cannot detemine input file extension. Exiting."<<std::endl;
+      std::cout<<"Cannot determine input file extension. Exiting."<<std::endl;
       return 1;
     }
     std::string iname;
     if( !PF::getFileName( "", bname, iname ) ) {
-      std::cout<<"Cannot detemine input file name. Exiting."<<std::endl;
+      std::cout<<"Cannot determine input file name. Exiting."<<std::endl;
       return 1;
     }
     std::cout<<"iname="<<iname<<std::endl;
@@ -228,7 +228,7 @@ int main (int argc, char *argv[])
 
     std::string oext;
     if( !PF::getFileExtension( "", img_out, oext ) ) {
-      std::cout<<"Cannot detemine input file extension. Exiting."<<std::endl;
+      std::cout<<"Cannot determine input file extension. Exiting."<<std::endl;
       return 1;
     }
     if( oext == "pfi") {
diff --git a/src/vips/gmic/gmic/src/CImg.h b/src/vips/gmic/gmic/src/CImg.h
index 268b9e622..64c36ec00 100644
--- a/src/vips/gmic/gmic/src/CImg.h
+++ b/src/vips/gmic/gmic/src/CImg.h
@@ -10549,7 +10549,7 @@ namespace cimg_library_suffixed {
       if (siz!=curr_siz) {
 	if (_is_shared)
           throw CImgArgumentException(_cimg_instance
-                                      "assign(): Invalid assignement request of shared instance from specified "
+                                      "assign(): Invalid assignment request of shared instance from specified "
                                       "image (%u,%u,%u,%u).",
                                       cimg_instance,
                                       size_x,size_y,size_z,size_c);
@@ -17185,7 +17185,7 @@ namespace cimg_library_suffixed {
               if (ss0!=expr._data || code.width()) { // (only allowed as the first instruction)
                 *se = saved_char; cimg::strellipsize(expr,64);
                 throw CImgArgumentException("[_cimg_math_parser] "
-                                            "CImg<%s>::%s: %s: Init invokation not done at the "
+                                            "CImg<%s>::%s: %s: Init invocation not done at the "
                                             "beginning of expression '%s%s%s'.",
                                             pixel_type(),_cimg_mp_calling_function,s_op,
                                             (ss - 4)>expr._data?"...":"",
diff --git a/src/vips/gmic/gmic/src/gmic.cpp b/src/vips/gmic/gmic/src/gmic.cpp
index 421ebfb16..58babd8a7 100644
--- a/src/vips/gmic/gmic/src/gmic.cpp
+++ b/src/vips/gmic/gmic/src/gmic.cpp
@@ -4718,7 +4718,7 @@ gmic& gmic::_run(const CImgList<char>& commands_line, unsigned int& position,
         // Check if a new name has been requested for a command that does not allow that.
         if (new_name && !is_double_hyphen && !is_input_command)
           error(images,0,0,
-                "Item '%s %s': Unknow name '%s'.",
+                "Item '%s %s': Unknown name '%s'.",
                 initial_item,initial_argument,new_name.data());
 
         // Dispatch to dedicated parsing code, regarding the first character of the command.
@@ -11792,7 +11792,7 @@ gmic& gmic::_run(const CImgList<char>& commands_line, unsigned int& position,
               commands_names[i].assign();
               commands_has_arguments[i].assign();
             }
-            print(images,0,"Discard definitions of all custom commmands (%u command%s discarded).",
+            print(images,0,"Discard definitions of all custom commands (%u command%s discarded).",
                   nb_commands,nb_commands>1?"s":"");
           } else { // Discard one or several custom command.
             g_list_c = CImg<char>::string(argument).get_split(CImg<char>::vector(','),0,false);
diff --git a/src/vips/gmic/gmic/src/gmic_def.gmic b/src/vips/gmic/gmic/src/gmic_def.gmic
index 68dc3745a..7d5d9f008 100644
--- a/src/vips/gmic/gmic/src/gmic_def.gmic
+++ b/src/vips/gmic/gmic/src/gmic_def.gmic
@@ -669,7 +669,7 @@ g=$_gmic_g c=$_gmic_c n=$_gmic_n r=$_gmic_r
 \n          cropped region of image "${g}"[ind]"$n" (or from default image selected if '"${c}"ind"$n"' is not specified).
 \n          Cropped region starts from point "${g}"(x,y,z,c)"$n" and has a size of "${g}"dx x dy x dz x dc"$n". Arguments for
 \n          coordinates and sizes can be omitted if they are not ambiguous (e.g. '"${c}"crop(#ind,x,y,dx,dy)"$n"' is a
-\n          valid invokation of this function).
+\n          valid invocation of this function).
 \n       . '"${c}"draw(_#ind,S,x,y,z,c,dx,_dy,_dz,_dc,_opacity,_M,_max_M)"$n"' draws a sprite "${g}"S"$n" in image "${g}"[ind]"$n"
 \n          (or in default image selected if '"${c}"ind"$n"' is not specified) at specified coordinates "${g}"(x,y,z,c)"$n".
 \n          The size of the sprite "${g}"dx x dy x dz x dc"$n" must be specified. You can also specify a corresponding