diff --git a/languages/zh-tw/parameters.genie b/languages/zh-tw/parameters.genie
new file mode 100644
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+++ b/languages/zh-tw/parameters.genie
@@ -0,0 +1,264 @@
+// -*- mode: js; indent-tabs-mode: nil; js-basic-offset: 4 -*-
+//
+// This file is part of ThingTalk
+//
+// Copyright 2017-2018 The Board of Trustees of the Leland Stanford Junior University
+//
+// Author: Giovanni Campagna <gcampagn@cs.stanford.edu>
+//
+// See COPYING for details
+
+{
+const assert = require('assert');
+
+const ThingTalk = require('thingtalk');
+const Ast = ThingTalk.Ast;
+const Type = ThingTalk.Type;
+const { clean } = require('../../lib/utils');
+
+// import the combinator library
+const C = require('../../lib/sentence-generator/ast_manip');
+}
+
+import '../common-parameters';
+
+// these are autogenerated and depends on projection_*, which is also
+// autogenerated
+projection_Any = {}
+stream_projection_Any = {}
+table_join_replace_placeholder = {}
+action_replace_param_with_table = {}
+action_replace_param_with_stream = {}
+
+projection_Numeric = {
+    projection_Number;
+    projection_Currency;
+    projection_Measure_ms;
+    projection_Measure_byte;
+    projection_Measure_kg;
+    projection_Measure_C;
+    projection_Measure_m;
+    projection_Measure_mps;
+    projection_Measure_Pa;
+    projection_Measure_kcal;
+}
+
+single_projection_String = table:complete_table => {
+    let outParams = Object.keys(table.schema.out);
+    if (outParams.length === 1 && table.schema.out[outParams[0]].isString)
+        return new Ast.Table.Projection(table, [outParams[0]], table.schema);
+
+    for (let pname in table.schema.out) {
+        if (pname === 'picture_url')
+            return null;
+        let ptype = table.schema.out[pname];
+        if ($options.types.id.has(C.typeToStringSafe(ptype)))
+            return null;
+    }
+    return new Ast.Table.Projection(table, ['$event'], table.schema);
+};
+single_stream_projection_String = ('新的' | '新') table:complete_table => {
+    if (!table.schema.is_monitorable)
+        return null;
+    let outParams = Object.keys(table.schema.out);
+    if (outParams.length === 1 && table.schema.out[outParams[0]].isString)
+        return new Ast.Stream.Projection(new Ast.Stream.Monitor(table, null, table.schema), [outParams[0]], table.schema);
+
+    for (let pname in table.schema.out) {
+        if (pname === 'picture_url')
+            return null;
+        let ptype = table.schema.out[pname];
+        if ($options.types.id.has(C.typeToStringSafe(ptype)))
+            return null;
+    }
+    return new Ast.Stream.Projection(new Ast.Stream.Monitor(table, null, table.schema), ['$event'], table.schema);
+};
+
+single_projection_Entity__tt__picture = table:complete_table => {
+    if (!table.schema.out['picture_url'])
+        return null;
+    return new Ast.Table.Projection(table, ['picture_url'], table.schema);
+};
+single_stream_projection_Entity__tt__picture = ('新的' | '新') table:complete_table => {
+    if (!table.schema.out['picture_url'])
+        return null;
+    if (!table.schema.is_monitorable)
+        return null;
+    return new Ast.Stream.Projection(new Ast.Stream.Monitor(table, null, table.schema), ['picture_url'], table.schema);
+};
+
+
+the_out_param_Numeric = {
+    p:out_param_Numeric => p;
+    !turking {
+        ('我' | '我的') p:out_param_Numeric => p;
+    }
+}
+the_out_param_Array__Any = {
+    p:out_param_Array__Any => p;
+    !turking {
+        ('我' | '我的') p:out_param_Array__Any => p;
+    }
+}
+
+for (let [typestr, type] of $options.types.all) {
+    // don't access booleans or enums out arguments generically, as that rarely makes sense
+    // (and when it does, you probably want a macro and maybe and edge trigger)
+    if (!type.isEnum && !type.isBoolean) {
+        $('the_out_param_' + typestr) = {
+            p:$('out_param_' + typestr) => p;
+
+            !turking {
+                ('我' | '我的') p:$('out_param_' + typestr) => p;
+            }
+        }
+
+        if (!$options.types.id.has(typestr)) {
+            $('projection_' + typestr) = table:complete_table '的' outParam:$('the_out_param_' + typestr) => {
+                const name = outParam.name;
+                if (!table.schema.out[name] || !Type.isAssignable(table.schema.out[name], type))
+                    return null;
+                if (name === 'picture_url' && $options.flags.turking)
+                    return null;
+                const newSchema = table.schema.filterArguments((arg) => arg.direction !== Ast.ArgDirection.OUT || arg.name === name);
+                return new Ast.Table.Projection(table, [name], newSchema);
+            };
+
+            $('stream_projection_' + typestr) = table:complete_table '的 新' outParam:$('the_out_param_' + typestr) => {
+                const name = outParam.name;
+                if (!table.schema.out[name] || !Type.isAssignable(table.schema.out[name], type))
+                    return null;
+                if (!table.schema.is_monitorable)
+                    return null;
+                const stream = new Ast.Stream.Monitor(table, null, table.schema);
+                const newSchema = stream.schema.filterArguments((arg, i) => arg.direction !== Ast.ArgDirection.OUT || arg.name === name);
+                return new Ast.Stream.Projection(stream, [name], newSchema);
+            };
+
+            projection_Any = $('projection_' + typestr);
+        }
+
+        if ($options.types.id.has(typestr)) {
+            $('single_projection_' + typestr) = table:complete_table => {
+                for (let pname in table.schema.out) {
+                    if (table.schema.out[pname].equals(type))
+                        return new Ast.Table.Projection(table, [pname], table.schema);
+                }
+                return null;
+            };
+
+            $('single_stream_projection_' + typestr) = ('新的' | '新') table:complete_table => {
+                if (!table.schema.is_monitorable)
+                    return null;
+                for (let pname in table.schema.out) {
+                    if (table.schema.out[pname].equals(type))
+                        return new Ast.Stream.Projection(new Ast.Stream.Monitor(table, null, table.schema), [pname], table.schema);
+                }
+                return null;
+            };
+        } else if (typestr !== 'Entity__tt__picture' && typestr !== 'String') {
+            $('single_projection_' + typestr) = table:complete_table => {
+                let outParams = Object.keys(table.schema.out);
+                if (outParams.length !== 1 || !type.equals(table.schema.out[outParams[0]]))
+                    return null;
+                return new Ast.Table.Projection(table, [outParams[0]], table.schema);
+            };
+
+            $('single_stream_projection_' + typestr) = ('新的' | '新') table:complete_table => {
+                let outParams = Object.keys(table.schema.out);
+                if (outParams.length !== 1 || !type.equals(table.schema.out[outParams[0]]))
+                    return null;
+                if (!table.schema.is_monitorable)
+                    return null;
+                return new Ast.Stream.Projection(new Ast.Stream.Monitor(table, null, table.schema), [outParams[0]], table.schema);
+            };
+        }
+    }
+}
+
+for (let [pname, typestr] of $options.params.in.values()) {
+    // don't parameter pass booleans or enums, as that rarely makes sense
+    if (typestr !== 'Boolean' && !typestr.startsWith('Enum__')) {
+        table_join_replace_placeholder = q:thingpedia_query p:$('single_projection_' + typestr) [-> pname] => C.tableJoinReplacePlaceholder(q, pname, p);
+        action_replace_param_with_table = a:thingpedia_action p:$('single_projection_' + typestr) [-> pname] => C.actionReplaceParamWithTable(a, pname, p);
+        action_replace_param_with_stream = a:thingpedia_action p:$('single_stream_projection_' + typestr) [-> pname] => C.actionReplaceParamWithStream(a, pname, p);
+
+        if ($options.types.id.has(typestr)) {
+            forward_get_do_command = command:forward_get_do_command [-> pname] => {
+                for (let joinArg in command.table.schema.out) {
+                    if (typestr === C.typeToStringSafe(command.table.schema.out[joinArg]))
+                        return C.getDoCommand(command, pname, new Ast.Value.VarRef(joinArg));
+                }
+                return null;
+            };
+
+            forward_when_do_rule = rule:forward_when_do_rule [-> pname] => {
+                for (let joinArg in rule.stream.schema.out) {
+                    if (typestr === C.typeToStringSafe(rule.stream.schema.out[joinArg]))
+                        return C.whenDoRule(rule, pname, new Ast.Value.VarRef(joinArg));
+                }
+                return null;
+            };
+
+            when_get_stream = stream:when_get_stream [-> pname] => {
+                for (let joinArg in stream.stream.schema.out) {
+                    if (typestr === C.typeToStringSafe(stream.stream.schema.out[joinArg]))
+                        return C.whenGetStream(stream, pname, new Ast.Value.VarRef(joinArg));
+                }
+                return null;
+            };
+        } else {
+            table_join_replace_placeholder = q:thingpedia_query p:$('projection_' + typestr) [-> pname] => C.tableJoinReplacePlaceholder(q, pname, p);
+            action_replace_param_with_table = a:thingpedia_action p:$('projection_' + typestr) [-> pname] => C.actionReplaceParamWithTable(a, pname, p);
+            action_replace_param_with_stream = a:thingpedia_action p:$('stream_projection_' + typestr) [-> pname] => C.actionReplaceParamWithStream(a, pname, p);
+
+            forward_get_do_command = !turking command:forward_get_do_command p:$('the_out_param_' + typestr) [-> pname] => C.getDoCommand(command, pname, p);
+            backward_get_do_command = !turking command:backward_get_do_command p:$('the_out_param_' + typestr) [-> pname] => C.getDoCommand(command, pname, p);
+            forward_when_do_rule = !turking rule:forward_when_do_rule p:$('the_out_param_' + typestr) [-> pname] => C.whenDoRule(rule, pname, p);
+            backward_when_do_rule = !turking rule:backward_when_do_rule p:$('the_out_param_' + typestr) [-> pname] => C.whenDoRule(rule, pname, p);
+            when_get_stream = !turking stream:when_get_stream p:$('the_out_param_' + typestr) [-> pname] => C.whenGetStream(stream, pname, p);
+        }
+
+        if (pname === 'p_picture_url') {
+            forward_get_do_command = command:forward_get_do_command [-> pname] => C.getDoCommand(command, pname, new Ast.Value.VarRef('picture_url'));
+            forward_when_do_rule = rule:forward_when_do_rule [-> pname] => C.whenDoRule(rule, pname, new Ast.Value.VarRef('picture_url'));
+            when_get_stream = stream:when_get_stream [-> pname] => C.whenGetStream(stream, pname, new Ast.Value.VarRef('picture_url'));
+        }
+
+        if (typestr === 'String' && ['p_body', 'p_message', 'p_caption', 'p_status', 'p_text'].indexOf(pname) >= 0) {
+            forward_get_do_command = command:forward_get_do_command [-> pname] => {
+                for (let pname in command.table.schema.out) {
+                    if (pname === 'picture_url')
+                        return null;
+                    let ptype = command.table.schema.out[pname];
+                    if ($options.types.id.has(C.typeToStringSafe(ptype)))
+                        return null;
+                }
+                return C.getDoCommand(command, pname, new Ast.Value.Event(null));
+            };
+
+            forward_when_do_rule = rule:forward_when_do_rule [-> pname] => {
+                for (let pname in rule.stream.schema.out) {
+                    if (pname === 'picture_url')
+                        return null;
+                    let ptype = rule.stream.schema.out[pname];
+                    if ($options.types.id.has(C.typeToStringSafe(ptype)))
+                        return null;
+                }
+                return C.whenDoRule(rule, pname, new Ast.Value.Event(null));
+            };
+
+            when_get_stream = stream:when_get_stream [-> pname] => {
+                for (let pname in stream.stream.schema.out) {
+                    if (pname === 'picture_url')
+                        return null;
+                    let ptype = stream.stream.schema.out[pname];
+                    if ($options.types.id.has(C.typeToStringSafe(ptype)))
+                        return null;
+                }
+                return C.whenGetStream(stream, pname, new Ast.Value.Event(null));
+            };
+        }
+    }
+}
+